/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:44:19,016 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:44:19,075 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 13:44:19,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:44:19,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:44:19,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:44:19,099 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:44:19,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:44:19,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:44:19,100 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:44:19,101 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:44:19,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:44:19,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:44:19,102 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:44:19,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:44:19,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:44:19,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:44:19,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:44:19,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:44:19,103 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:44:19,104 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:44:19,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:44:19,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:44:19,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:44:19,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:44:19,111 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:44:19,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:44:19,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:44:19,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:44:19,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:44:19,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:44:19,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:44:19,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:44:19,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:44:19,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:44:19,113 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:44:19,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:44:19,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:44:19,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:44:19,441 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:44:19,442 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:44:19,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-26 13:44:20,660 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:44:20,880 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:44:20,881 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-08-26 13:44:20,888 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c126f26/6698021479d942b8b23ba46d94302dec/FLAG1b6b3cf92 [2023-08-26 13:44:20,904 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c126f26/6698021479d942b8b23ba46d94302dec [2023-08-26 13:44:20,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:44:20,911 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:44:20,916 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:44:20,916 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:44:20,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:44:20,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:44:20" (1/1) ... [2023-08-26 13:44:20,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f26c82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:20, skipping insertion in model container [2023-08-26 13:44:20,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:44:20" (1/1) ... [2023-08-26 13:44:20,939 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:44:21,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:44:21,113 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:44:21,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:44:21,147 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:44:21,148 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:44:21,153 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:44:21,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21 WrapperNode [2023-08-26 13:44:21,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:44:21,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:44:21,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:44:21,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:44:21,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,195 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 56 [2023-08-26 13:44:21,196 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:44:21,196 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:44:21,197 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:44:21,197 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:44:21,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,228 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,230 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:44:21,231 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:44:21,231 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:44:21,231 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:44:21,232 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (1/1) ... [2023-08-26 13:44:21,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:44:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:21,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 13:44:21,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 13:44:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:44:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:44:21,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:44:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:44:21,294 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:44:21,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:44:21,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:44:21,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:44:21,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:44:21,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:44:21,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:44:21,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:44:21,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:44:21,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:44:21,296 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 13:44:21,370 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:44:21,371 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:44:21,613 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:44:21,662 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:44:21,663 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 13:44:21,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:44:21 BoogieIcfgContainer [2023-08-26 13:44:21,669 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:44:21,672 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:44:21,672 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:44:21,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:44:21,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:44:20" (1/3) ... [2023-08-26 13:44:21,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238b9bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:44:21, skipping insertion in model container [2023-08-26 13:44:21,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:44:21" (2/3) ... [2023-08-26 13:44:21,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238b9bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:44:21, skipping insertion in model container [2023-08-26 13:44:21,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:44:21" (3/3) ... [2023-08-26 13:44:21,678 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-08-26 13:44:21,693 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:44:21,694 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 13:44:21,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:44:21,768 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 13:44:21,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2023-08-26 13:44:21,868 INFO L124 PetriNetUnfolderBase]: 6/84 cut-off events. [2023-08-26 13:44:21,868 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:44:21,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-26 13:44:21,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2023-08-26 13:44:21,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2023-08-26 13:44:21,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:44:21,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 162 flow [2023-08-26 13:44:21,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 162 flow [2023-08-26 13:44:21,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 162 flow [2023-08-26 13:44:21,929 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2023-08-26 13:44:21,929 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:44:21,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-26 13:44:21,931 INFO L119 LiptonReduction]: Number of co-enabled transitions 580 [2023-08-26 13:44:24,464 INFO L134 LiptonReduction]: Checked pairs total: 664 [2023-08-26 13:44:24,464 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-26 13:44:24,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:44:24,482 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@76fc53fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:44:24,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 13:44:24,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:44:24,483 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:44:24,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:44:24,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:24,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:44:24,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:24,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash 349, now seen corresponding path program 1 times [2023-08-26 13:44:24,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:24,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579655217] [2023-08-26 13:44:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:24,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:24,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:24,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579655217] [2023-08-26 13:44:24,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579655217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:44:24,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:44:24,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:44:24,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981489111] [2023-08-26 13:44:24,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:44:24,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:44:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:44:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:44:24,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 163 [2023-08-26 13:44:24,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:24,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 163 [2023-08-26 13:44:24,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:24,646 INFO L124 PetriNetUnfolderBase]: 100/163 cut-off events. [2023-08-26 13:44:24,646 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 13:44:24,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 514 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-26 13:44:24,648 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 13:44:24,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-26 13:44:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:44:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:44:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 171 transitions. [2023-08-26 13:44:24,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245398773006135 [2023-08-26 13:44:24,664 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 171 transitions. [2023-08-26 13:44:24,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 171 transitions. [2023-08-26 13:44:24,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:24,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 171 transitions. [2023-08-26 13:44:24,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,679 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,680 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 171 transitions. [2023-08-26 13:44:24,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-26 13:44:24,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 13:44:24,684 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 13:44:24,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-26 13:44:24,690 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 13:44:24,690 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 13:44:24,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:24,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:44:24,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:44:24,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:24,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 342111, now seen corresponding path program 1 times [2023-08-26 13:44:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:24,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494135592] [2023-08-26 13:44:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:24,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:24,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494135592] [2023-08-26 13:44:24,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494135592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:44:24,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:44:24,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:44:24,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609374687] [2023-08-26 13:44:24,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:44:24,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:44:24,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:44:24,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:44:24,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 163 [2023-08-26 13:44:24,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:24,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 163 [2023-08-26 13:44:24,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:24,913 INFO L124 PetriNetUnfolderBase]: 93/150 cut-off events. [2023-08-26 13:44:24,913 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:44:24,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 446 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-26 13:44:24,914 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 13:44:24,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-26 13:44:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:44:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:44:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-08-26 13:44:24,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946830265848671 [2023-08-26 13:44:24,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-08-26 13:44:24,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-08-26 13:44:24,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:24,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-08-26 13:44:24,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,920 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 193 transitions. [2023-08-26 13:44:24,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-26 13:44:24,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:44:24,921 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 13:44:24,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-26 13:44:24,922 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 13:44:24,922 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 13:44:24,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:24,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:44:24,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:44:24,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:24,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash 342109, now seen corresponding path program 1 times [2023-08-26 13:44:24,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:24,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574737130] [2023-08-26 13:44:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:24,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574737130] [2023-08-26 13:44:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574737130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:44:24,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:44:24,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:44:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195561514] [2023-08-26 13:44:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:44:24,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:44:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:44:24,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:44:24,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 163 [2023-08-26 13:44:24,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:24,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:24,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 163 [2023-08-26 13:44:24,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:25,039 INFO L124 PetriNetUnfolderBase]: 86/137 cut-off events. [2023-08-26 13:44:25,039 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:44:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 404 event pairs, 36 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-26 13:44:25,041 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 13:44:25,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-26 13:44:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:44:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:44:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 13:44:25,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-08-26 13:44:25,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 13:44:25,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 13:44:25,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:25,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 13:44:25,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,046 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 185 transitions. [2023-08-26 13:44:25,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-26 13:44:25,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:44:25,047 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 13:44:25,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 13:44:25,047 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 13:44:25,048 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 13:44:25,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:25,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:44:25,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:44:25,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:25,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash 328775440, now seen corresponding path program 1 times [2023-08-26 13:44:25,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:25,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799751982] [2023-08-26 13:44:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:25,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:25,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799751982] [2023-08-26 13:44:25,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799751982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:44:25,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:44:25,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:44:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060623360] [2023-08-26 13:44:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:44:25,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:44:25,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:44:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:44:25,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 163 [2023-08-26 13:44:25,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:25,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 163 [2023-08-26 13:44:25,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:25,221 INFO L124 PetriNetUnfolderBase]: 65/107 cut-off events. [2023-08-26 13:44:25,221 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:44:25,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 287 event pairs, 27 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-26 13:44:25,225 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 13:44:25,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-26 13:44:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:44:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:44:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-08-26 13:44:25,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3558282208588957 [2023-08-26 13:44:25,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-08-26 13:44:25,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-08-26 13:44:25,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:25,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-08-26 13:44:25,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,233 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 174 transitions. [2023-08-26 13:44:25,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-26 13:44:25,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:44:25,234 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 13:44:25,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 13:44:25,235 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 13:44:25,236 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 13:44:25,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:25,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:44:25,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:44:25,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:25,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:25,237 INFO L85 PathProgramCache]: Analyzing trace with hash 328775439, now seen corresponding path program 1 times [2023-08-26 13:44:25,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:25,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222635373] [2023-08-26 13:44:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:25,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:25,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:25,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222635373] [2023-08-26 13:44:25,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222635373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:44:25,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:44:25,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:44:25,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521770088] [2023-08-26 13:44:25,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:44:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:44:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:44:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:44:25,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 163 [2023-08-26 13:44:25,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:25,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 163 [2023-08-26 13:44:25,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:25,396 INFO L124 PetriNetUnfolderBase]: 44/77 cut-off events. [2023-08-26 13:44:25,396 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:44:25,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 171 event pairs, 18 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-26 13:44:25,397 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 13:44:25,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-26 13:44:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:44:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:44:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-08-26 13:44:25,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35991820040899797 [2023-08-26 13:44:25,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-08-26 13:44:25,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-08-26 13:44:25,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:25,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-08-26 13:44:25,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,401 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,401 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 176 transitions. [2023-08-26 13:44:25,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-26 13:44:25,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:44:25,402 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 13:44:25,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 13:44:25,405 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 13:44:25,406 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 13:44:25,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:25,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:25,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:44:25,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:25,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1177051866, now seen corresponding path program 1 times [2023-08-26 13:44:25,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:25,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842859437] [2023-08-26 13:44:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:25,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:25,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:25,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842859437] [2023-08-26 13:44:25,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842859437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:44:25,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:44:25,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:44:25,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785090269] [2023-08-26 13:44:25,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:44:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:44:25,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:25,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:44:25,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:44:25,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 163 [2023-08-26 13:44:25,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:25,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 163 [2023-08-26 13:44:25,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:25,594 INFO L124 PetriNetUnfolderBase]: 54/95 cut-off events. [2023-08-26 13:44:25,594 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:44:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 240 event pairs, 20 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2023-08-26 13:44:25,596 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-26 13:44:25,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-08-26 13:44:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:44:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:44:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-08-26 13:44:25,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42484662576687116 [2023-08-26 13:44:25,598 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-08-26 13:44:25,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-08-26 13:44:25,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:25,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-08-26 13:44:25,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,601 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,601 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 277 transitions. [2023-08-26 13:44:25,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-08-26 13:44:25,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:44:25,603 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-08-26 13:44:25,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-08-26 13:44:25,605 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-08-26 13:44:25,608 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-08-26 13:44:25,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:25,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:44:25,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:25,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1616625318, now seen corresponding path program 1 times [2023-08-26 13:44:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947627472] [2023-08-26 13:44:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:25,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:25,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947627472] [2023-08-26 13:44:25,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947627472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:44:25,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:44:25,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:44:25,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022432967] [2023-08-26 13:44:25,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:44:25,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:44:25,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:25,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:44:25,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:44:25,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 163 [2023-08-26 13:44:25,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:25,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 163 [2023-08-26 13:44:25,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:25,767 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-08-26 13:44:25,768 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-26 13:44:25,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 116 events. 65/116 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 265 event pairs, 24 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 292. Up to 73 conditions per place. [2023-08-26 13:44:25,769 INFO L140 encePairwiseOnDemand]: 157/163 looper letters, 23 selfloop transitions, 9 changer transitions 0/32 dead transitions. [2023-08-26 13:44:25,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 160 flow [2023-08-26 13:44:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:44:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:44:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 412 transitions. [2023-08-26 13:44:25,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212678936605317 [2023-08-26 13:44:25,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 412 transitions. [2023-08-26 13:44:25,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 412 transitions. [2023-08-26 13:44:25,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:25,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 412 transitions. [2023-08-26 13:44:25,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.66666666666667) internal successors, (412), 6 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 163.0) internal successors, (1141), 7 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,774 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 163.0) internal successors, (1141), 7 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,774 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 6 states and 412 transitions. [2023-08-26 13:44:25,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 160 flow [2023-08-26 13:44:25,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 32 transitions, 150 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 13:44:25,778 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 92 flow [2023-08-26 13:44:25,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-08-26 13:44:25,780 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-08-26 13:44:25,780 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 92 flow [2023-08-26 13:44:25,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:25,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:25,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:25,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:44:25,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:25,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash 851540347, now seen corresponding path program 1 times [2023-08-26 13:44:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821986054] [2023-08-26 13:44:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:25,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821986054] [2023-08-26 13:44:25,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821986054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587091739] [2023-08-26 13:44:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:25,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:25,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:25,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 13:44:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:26,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 13:44:26,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:26,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:26,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587091739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:26,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:26,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-08-26 13:44:26,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971487699] [2023-08-26 13:44:26,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:26,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:44:26,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:26,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:44:26,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:44:26,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 163 [2023-08-26 13:44:26,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 92 flow. Second operand has 6 states, 6 states have (on average 76.5) internal successors, (459), 6 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:26,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 163 [2023-08-26 13:44:26,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:26,386 INFO L124 PetriNetUnfolderBase]: 92/171 cut-off events. [2023-08-26 13:44:26,386 INFO L125 PetriNetUnfolderBase]: For 80/89 co-relation queries the response was YES. [2023-08-26 13:44:26,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 171 events. 92/171 cut-off events. For 80/89 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 548 event pairs, 8 based on Foata normal form. 10/134 useless extension candidates. Maximal degree in co-relation 529. Up to 61 conditions per place. [2023-08-26 13:44:26,387 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 29 selfloop transitions, 7 changer transitions 4/44 dead transitions. [2023-08-26 13:44:26,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 254 flow [2023-08-26 13:44:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:44:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:44:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2023-08-26 13:44:26,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015337423312883 [2023-08-26 13:44:26,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2023-08-26 13:44:26,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2023-08-26 13:44:26,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:26,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2023-08-26 13:44:26,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,394 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 92 flow. Second operand 4 states and 327 transitions. [2023-08-26 13:44:26,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 254 flow [2023-08-26 13:44:26,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 44 transitions, 241 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 13:44:26,398 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 134 flow [2023-08-26 13:44:26,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-26 13:44:26,401 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-08-26 13:44:26,401 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 134 flow [2023-08-26 13:44:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.5) internal successors, (459), 6 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:26,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:26,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 13:44:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:26,608 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:26,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1877125933, now seen corresponding path program 2 times [2023-08-26 13:44:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809673143] [2023-08-26 13:44:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:44:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809673143] [2023-08-26 13:44:26,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809673143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313550811] [2023-08-26 13:44:26,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:44:26,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:26,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:26,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 13:44:26,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:44:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:26,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:44:26,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:44:26,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:44:26,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313550811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:26,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:26,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-26 13:44:26,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462073389] [2023-08-26 13:44:26,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:26,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:44:26,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:44:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:44:26,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 163 [2023-08-26 13:44:26,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:26,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 163 [2023-08-26 13:44:26,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:26,926 INFO L124 PetriNetUnfolderBase]: 124/223 cut-off events. [2023-08-26 13:44:26,926 INFO L125 PetriNetUnfolderBase]: For 382/388 co-relation queries the response was YES. [2023-08-26 13:44:26,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 223 events. 124/223 cut-off events. For 382/388 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 672 event pairs, 34 based on Foata normal form. 22/245 useless extension candidates. Maximal degree in co-relation 790. Up to 180 conditions per place. [2023-08-26 13:44:26,929 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 31 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-26 13:44:26,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 288 flow [2023-08-26 13:44:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:44:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:44:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 356 transitions. [2023-08-26 13:44:26,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368098159509202 [2023-08-26 13:44:26,931 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 356 transitions. [2023-08-26 13:44:26,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 356 transitions. [2023-08-26 13:44:26,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:26,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 356 transitions. [2023-08-26 13:44:26,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,938 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,938 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 134 flow. Second operand 5 states and 356 transitions. [2023-08-26 13:44:26,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 288 flow [2023-08-26 13:44:26,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:44:26,941 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 201 flow [2023-08-26 13:44:26,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-26 13:44:26,942 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2023-08-26 13:44:26,942 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 201 flow [2023-08-26 13:44:26,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:26,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:26,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:26,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:27,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-26 13:44:27,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:27,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 56788429, now seen corresponding path program 3 times [2023-08-26 13:44:27,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:27,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695147949] [2023-08-26 13:44:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:27,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:27,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:27,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695147949] [2023-08-26 13:44:27,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695147949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:27,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321495727] [2023-08-26 13:44:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:44:27,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:27,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:27,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 13:44:27,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:44:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:27,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 13:44:27,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:27,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:27,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321495727] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:27,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:27,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 13:44:27,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622794047] [2023-08-26 13:44:27,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:27,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:44:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:44:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:44:27,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:27,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 201 flow. Second operand has 16 states, 16 states have (on average 63.4375) internal successors, (1015), 16 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:27,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:27,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:27,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:28,018 INFO L124 PetriNetUnfolderBase]: 209/372 cut-off events. [2023-08-26 13:44:28,018 INFO L125 PetriNetUnfolderBase]: For 975/975 co-relation queries the response was YES. [2023-08-26 13:44:28,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 372 events. 209/372 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1352 event pairs, 8 based on Foata normal form. 12/384 useless extension candidates. Maximal degree in co-relation 1497. Up to 127 conditions per place. [2023-08-26 13:44:28,021 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 65 selfloop transitions, 45 changer transitions 19/129 dead transitions. [2023-08-26 13:44:28,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 129 transitions, 962 flow [2023-08-26 13:44:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 13:44:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 13:44:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1582 transitions. [2023-08-26 13:44:28,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043967280163599 [2023-08-26 13:44:28,026 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1582 transitions. [2023-08-26 13:44:28,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1582 transitions. [2023-08-26 13:44:28,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:28,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1582 transitions. [2023-08-26 13:44:28,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.91666666666667) internal successors, (1582), 24 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,038 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,038 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 201 flow. Second operand 24 states and 1582 transitions. [2023-08-26 13:44:28,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 129 transitions, 962 flow [2023-08-26 13:44:28,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 129 transitions, 929 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-26 13:44:28,045 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 569 flow [2023-08-26 13:44:28,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=569, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-08-26 13:44:28,046 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2023-08-26 13:44:28,046 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 569 flow [2023-08-26 13:44:28,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.4375) internal successors, (1015), 16 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:28,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:28,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:28,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:28,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:28,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1792487887, now seen corresponding path program 4 times [2023-08-26 13:44:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810313668] [2023-08-26 13:44:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:28,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810313668] [2023-08-26 13:44:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810313668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450197249] [2023-08-26 13:44:28,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:44:28,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:28,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:28,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 13:44:28,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:44:28,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:28,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:44:28,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:28,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:28,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450197249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:28,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:28,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 13:44:28,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316048665] [2023-08-26 13:44:28,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:28,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 13:44:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 13:44:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:44:28,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:28,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 569 flow. Second operand has 15 states, 15 states have (on average 63.4) internal successors, (951), 15 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:28,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:28,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:28,932 INFO L124 PetriNetUnfolderBase]: 245/435 cut-off events. [2023-08-26 13:44:28,932 INFO L125 PetriNetUnfolderBase]: For 3263/3263 co-relation queries the response was YES. [2023-08-26 13:44:28,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2286 conditions, 435 events. 245/435 cut-off events. For 3263/3263 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1607 event pairs, 11 based on Foata normal form. 30/465 useless extension candidates. Maximal degree in co-relation 2267. Up to 157 conditions per place. [2023-08-26 13:44:28,937 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 75 selfloop transitions, 62 changer transitions 0/137 dead transitions. [2023-08-26 13:44:28,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 1368 flow [2023-08-26 13:44:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:44:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:44:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1252 transitions. [2023-08-26 13:44:28,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042621892153697 [2023-08-26 13:44:28,941 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1252 transitions. [2023-08-26 13:44:28,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1252 transitions. [2023-08-26 13:44:28,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:28,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1252 transitions. [2023-08-26 13:44:28,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.89473684210526) internal successors, (1252), 19 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,950 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 163.0) internal successors, (3260), 20 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,950 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 569 flow. Second operand 19 states and 1252 transitions. [2023-08-26 13:44:28,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 1368 flow [2023-08-26 13:44:28,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 137 transitions, 1122 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-08-26 13:44:28,962 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 916 flow [2023-08-26 13:44:28,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=916, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2023-08-26 13:44:28,963 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2023-08-26 13:44:28,963 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 916 flow [2023-08-26 13:44:28,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.4) internal successors, (951), 15 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:28,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:28,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:28,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:29,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:29,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:29,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:29,170 INFO L85 PathProgramCache]: Analyzing trace with hash -757366595, now seen corresponding path program 5 times [2023-08-26 13:44:29,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:29,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708452090] [2023-08-26 13:44:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:29,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:29,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:29,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708452090] [2023-08-26 13:44:29,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708452090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169321925] [2023-08-26 13:44:29,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:44:29,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:29,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 13:44:29,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:44:29,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:29,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 13:44:29,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:29,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:29,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169321925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:29,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:29,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 13:44:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126714072] [2023-08-26 13:44:29,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:29,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 13:44:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 13:44:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:44:29,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:29,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 916 flow. Second operand has 15 states, 15 states have (on average 63.0) internal successors, (945), 15 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:29,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:29,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:29,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:29,902 INFO L124 PetriNetUnfolderBase]: 345/637 cut-off events. [2023-08-26 13:44:29,902 INFO L125 PetriNetUnfolderBase]: For 9302/9302 co-relation queries the response was YES. [2023-08-26 13:44:29,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3499 conditions, 637 events. 345/637 cut-off events. For 9302/9302 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2807 event pairs, 11 based on Foata normal form. 30/667 useless extension candidates. Maximal degree in co-relation 3472. Up to 215 conditions per place. [2023-08-26 13:44:29,909 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 82 selfloop transitions, 98 changer transitions 1/181 dead transitions. [2023-08-26 13:44:29,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 1926 flow [2023-08-26 13:44:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:44:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 13:44:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1448 transitions. [2023-08-26 13:44:29,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403792526491913 [2023-08-26 13:44:29,914 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1448 transitions. [2023-08-26 13:44:29,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1448 transitions. [2023-08-26 13:44:29,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:29,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1448 transitions. [2023-08-26 13:44:29,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.81818181818181) internal successors, (1448), 22 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:29,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:29,923 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 163.0) internal successors, (3749), 23 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:29,923 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 916 flow. Second operand 22 states and 1448 transitions. [2023-08-26 13:44:29,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 1926 flow [2023-08-26 13:44:29,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 181 transitions, 1775 flow, removed 62 selfloop flow, removed 4 redundant places. [2023-08-26 13:44:29,944 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1453 flow [2023-08-26 13:44:29,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1453, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2023-08-26 13:44:29,945 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 88 predicate places. [2023-08-26 13:44:29,945 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1453 flow [2023-08-26 13:44:29,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.0) internal successors, (945), 15 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:29,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:29,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:29,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:30,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 13:44:30,152 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:30,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:30,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1615646479, now seen corresponding path program 6 times [2023-08-26 13:44:30,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:30,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230681536] [2023-08-26 13:44:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230681536] [2023-08-26 13:44:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230681536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287820586] [2023-08-26 13:44:30,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:44:30,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:30,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:30,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:30,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 13:44:30,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:44:30,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:30,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 13:44:30,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:30,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:30,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287820586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:30,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:30,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-26 13:44:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952327900] [2023-08-26 13:44:30,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:30,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:44:30,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:44:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:44:30,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:30,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1453 flow. Second operand has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:30,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:30,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:30,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:30,863 INFO L124 PetriNetUnfolderBase]: 337/601 cut-off events. [2023-08-26 13:44:30,863 INFO L125 PetriNetUnfolderBase]: For 9191/9191 co-relation queries the response was YES. [2023-08-26 13:44:30,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 601 events. 337/601 cut-off events. For 9191/9191 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2517 event pairs, 14 based on Foata normal form. 6/607 useless extension candidates. Maximal degree in co-relation 3816. Up to 304 conditions per place. [2023-08-26 13:44:30,870 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 79 selfloop transitions, 84 changer transitions 4/167 dead transitions. [2023-08-26 13:44:30,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 167 transitions, 2122 flow [2023-08-26 13:44:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:44:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:44:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1047 transitions. [2023-08-26 13:44:30,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014570552147239 [2023-08-26 13:44:30,873 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1047 transitions. [2023-08-26 13:44:30,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1047 transitions. [2023-08-26 13:44:30,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:30,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1047 transitions. [2023-08-26 13:44:30,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.4375) internal successors, (1047), 16 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:30,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 163.0) internal successors, (2771), 17 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:30,880 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 163.0) internal successors, (2771), 17 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:30,880 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1453 flow. Second operand 16 states and 1047 transitions. [2023-08-26 13:44:30,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 167 transitions, 2122 flow [2023-08-26 13:44:30,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 167 transitions, 1969 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-08-26 13:44:30,902 INFO L231 Difference]: Finished difference. Result has 126 places, 136 transitions, 1648 flow [2023-08-26 13:44:30,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1648, PETRI_PLACES=126, PETRI_TRANSITIONS=136} [2023-08-26 13:44:30,903 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2023-08-26 13:44:30,903 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 136 transitions, 1648 flow [2023-08-26 13:44:30,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:30,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:30,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:30,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:31,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:31,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:31,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1807182571, now seen corresponding path program 7 times [2023-08-26 13:44:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:31,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251222550] [2023-08-26 13:44:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:31,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251222550] [2023-08-26 13:44:31,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251222550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661615174] [2023-08-26 13:44:31,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:44:31,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:31,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:31,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:31,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 13:44:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:31,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 13:44:31,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:31,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:31,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661615174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:31,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:31,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 13:44:31,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884987476] [2023-08-26 13:44:31,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:31,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:44:31,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:44:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:44:31,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:31,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 136 transitions, 1648 flow. Second operand has 18 states, 18 states have (on average 63.333333333333336) internal successors, (1140), 18 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:31,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:31,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:31,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:32,099 INFO L124 PetriNetUnfolderBase]: 484/854 cut-off events. [2023-08-26 13:44:32,099 INFO L125 PetriNetUnfolderBase]: For 10728/10728 co-relation queries the response was YES. [2023-08-26 13:44:32,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5497 conditions, 854 events. 484/854 cut-off events. For 10728/10728 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3934 event pairs, 13 based on Foata normal form. 10/864 useless extension candidates. Maximal degree in co-relation 5460. Up to 262 conditions per place. [2023-08-26 13:44:32,109 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 109 selfloop transitions, 146 changer transitions 0/255 dead transitions. [2023-08-26 13:44:32,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 255 transitions, 3271 flow [2023-08-26 13:44:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 13:44:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 13:44:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1892 transitions. [2023-08-26 13:44:32,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002538607996615 [2023-08-26 13:44:32,114 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1892 transitions. [2023-08-26 13:44:32,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1892 transitions. [2023-08-26 13:44:32,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:32,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1892 transitions. [2023-08-26 13:44:32,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.24137931034483) internal successors, (1892), 29 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:32,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 163.0) internal successors, (4890), 30 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:32,130 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 163.0) internal successors, (4890), 30 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:32,130 INFO L175 Difference]: Start difference. First operand has 126 places, 136 transitions, 1648 flow. Second operand 29 states and 1892 transitions. [2023-08-26 13:44:32,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 255 transitions, 3271 flow [2023-08-26 13:44:32,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 255 transitions, 2983 flow, removed 64 selfloop flow, removed 10 redundant places. [2023-08-26 13:44:32,175 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2702 flow [2023-08-26 13:44:32,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2702, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2023-08-26 13:44:32,176 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 122 predicate places. [2023-08-26 13:44:32,177 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2702 flow [2023-08-26 13:44:32,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.333333333333336) internal successors, (1140), 18 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:32,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:32,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:32,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:32,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:32,383 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:32,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2064225673, now seen corresponding path program 8 times [2023-08-26 13:44:32,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:32,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559899911] [2023-08-26 13:44:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:32,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:32,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559899911] [2023-08-26 13:44:32,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559899911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:32,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402294093] [2023-08-26 13:44:32,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:44:32,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:32,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:32,484 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:32,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 13:44:32,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:44:32,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:32,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 13:44:32,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:32,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:32,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402294093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:32,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:32,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:44:32,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559159433] [2023-08-26 13:44:32,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:32,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:44:32,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:44:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:44:32,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:32,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 2702 flow. Second operand has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:32,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:32,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:32,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:33,093 INFO L124 PetriNetUnfolderBase]: 544/946 cut-off events. [2023-08-26 13:44:33,093 INFO L125 PetriNetUnfolderBase]: For 14595/14595 co-relation queries the response was YES. [2023-08-26 13:44:33,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 946 events. 544/946 cut-off events. For 14595/14595 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4416 event pairs, 17 based on Foata normal form. 16/962 useless extension candidates. Maximal degree in co-relation 6894. Up to 741 conditions per place. [2023-08-26 13:44:33,105 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 188 selfloop transitions, 66 changer transitions 2/256 dead transitions. [2023-08-26 13:44:33,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 256 transitions, 3917 flow [2023-08-26 13:44:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:44:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:44:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1045 transitions. [2023-08-26 13:44:33,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069018404907975 [2023-08-26 13:44:33,107 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1045 transitions. [2023-08-26 13:44:33,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1045 transitions. [2023-08-26 13:44:33,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:33,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1045 transitions. [2023-08-26 13:44:33,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.3125) internal successors, (1045), 16 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:33,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 163.0) internal successors, (2771), 17 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:33,112 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 163.0) internal successors, (2771), 17 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:33,112 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2702 flow. Second operand 16 states and 1045 transitions. [2023-08-26 13:44:33,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 256 transitions, 3917 flow [2023-08-26 13:44:33,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 256 transitions, 3725 flow, removed 49 selfloop flow, removed 14 redundant places. [2023-08-26 13:44:33,175 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 3243 flow [2023-08-26 13:44:33,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3243, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2023-08-26 13:44:33,175 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2023-08-26 13:44:33,175 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 3243 flow [2023-08-26 13:44:33,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:33,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:33,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:33,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 13:44:33,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 13:44:33,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:33,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1282806569, now seen corresponding path program 9 times [2023-08-26 13:44:33,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:33,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034012418] [2023-08-26 13:44:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:33,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:33,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034012418] [2023-08-26 13:44:33,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034012418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383145068] [2023-08-26 13:44:33,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:44:33,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:33,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:33,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:33,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 13:44:33,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:44:33,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:33,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 13:44:33,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:33,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:44:33,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383145068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:33,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:33,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:44:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290923119] [2023-08-26 13:44:33,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:33,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:44:33,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:44:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:44:33,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:33,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 3243 flow. Second operand has 16 states, 16 states have (on average 63.375) internal successors, (1014), 16 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:33,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:33,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:33,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:34,217 INFO L124 PetriNetUnfolderBase]: 532/944 cut-off events. [2023-08-26 13:44:34,217 INFO L125 PetriNetUnfolderBase]: For 19058/19058 co-relation queries the response was YES. [2023-08-26 13:44:34,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6835 conditions, 944 events. 532/944 cut-off events. For 19058/19058 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4549 event pairs, 27 based on Foata normal form. 30/974 useless extension candidates. Maximal degree in co-relation 6786. Up to 721 conditions per place. [2023-08-26 13:44:34,231 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 199 selfloop transitions, 62 changer transitions 3/264 dead transitions. [2023-08-26 13:44:34,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 264 transitions, 3874 flow [2023-08-26 13:44:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 13:44:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 13:44:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1311 transitions. [2023-08-26 13:44:34,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021472392638037 [2023-08-26 13:44:34,235 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1311 transitions. [2023-08-26 13:44:34,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1311 transitions. [2023-08-26 13:44:34,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:34,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1311 transitions. [2023-08-26 13:44:34,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.55) internal successors, (1311), 20 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:34,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:34,243 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 163.0) internal successors, (3423), 21 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:34,243 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 3243 flow. Second operand 20 states and 1311 transitions. [2023-08-26 13:44:34,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 264 transitions, 3874 flow [2023-08-26 13:44:34,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 264 transitions, 3590 flow, removed 107 selfloop flow, removed 8 redundant places. [2023-08-26 13:44:34,306 INFO L231 Difference]: Finished difference. Result has 168 places, 223 transitions, 2962 flow [2023-08-26 13:44:34,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2962, PETRI_PLACES=168, PETRI_TRANSITIONS=223} [2023-08-26 13:44:34,308 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 140 predicate places. [2023-08-26 13:44:34,308 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 223 transitions, 2962 flow [2023-08-26 13:44:34,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.375) internal successors, (1014), 16 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:34,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:34,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:34,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 13:44:34,515 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:34,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash 971942838, now seen corresponding path program 10 times [2023-08-26 13:44:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:34,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833496378] [2023-08-26 13:44:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833496378] [2023-08-26 13:44:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833496378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815732312] [2023-08-26 13:44:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:44:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:34,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:34,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 13:44:34,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:44:34,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:34,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:44:34,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:34,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:34,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815732312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:34,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:34,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-08-26 13:44:34,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365491728] [2023-08-26 13:44:34,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:44:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:44:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:44:34,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 163 [2023-08-26 13:44:34,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 223 transitions, 2962 flow. Second operand has 9 states, 9 states have (on average 76.0) internal successors, (684), 9 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:34,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:34,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 163 [2023-08-26 13:44:34,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:35,221 INFO L124 PetriNetUnfolderBase]: 755/1326 cut-off events. [2023-08-26 13:44:35,221 INFO L125 PetriNetUnfolderBase]: For 19221/19229 co-relation queries the response was YES. [2023-08-26 13:44:35,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9592 conditions, 1326 events. 755/1326 cut-off events. For 19221/19229 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6952 event pairs, 43 based on Foata normal form. 9/1327 useless extension candidates. Maximal degree in co-relation 9544. Up to 695 conditions per place. [2023-08-26 13:44:35,242 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 212 selfloop transitions, 85 changer transitions 37/342 dead transitions. [2023-08-26 13:44:35,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 342 transitions, 5112 flow [2023-08-26 13:44:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:44:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:44:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2023-08-26 13:44:35,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042944785276073 [2023-08-26 13:44:35,243 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 411 transitions. [2023-08-26 13:44:35,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 411 transitions. [2023-08-26 13:44:35,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:35,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 411 transitions. [2023-08-26 13:44:35,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:35,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:35,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:35,252 INFO L175 Difference]: Start difference. First operand has 168 places, 223 transitions, 2962 flow. Second operand 5 states and 411 transitions. [2023-08-26 13:44:35,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 342 transitions, 5112 flow [2023-08-26 13:44:35,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 342 transitions, 4883 flow, removed 47 selfloop flow, removed 17 redundant places. [2023-08-26 13:44:35,325 INFO L231 Difference]: Finished difference. Result has 157 places, 266 transitions, 3770 flow [2023-08-26 13:44:35,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3770, PETRI_PLACES=157, PETRI_TRANSITIONS=266} [2023-08-26 13:44:35,326 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2023-08-26 13:44:35,326 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 266 transitions, 3770 flow [2023-08-26 13:44:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 76.0) internal successors, (684), 9 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:35,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:35,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:35,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:35,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 13:44:35,533 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:35,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2100433250, now seen corresponding path program 11 times [2023-08-26 13:44:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:35,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652587244] [2023-08-26 13:44:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:35,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:35,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652587244] [2023-08-26 13:44:35,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652587244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124995272] [2023-08-26 13:44:35,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:44:35,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:35,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:35,705 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:35,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 13:44:35,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:44:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:35,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:44:35,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:44:35,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:44:35,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124995272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:35,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:35,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2023-08-26 13:44:35,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109308931] [2023-08-26 13:44:35,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:35,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:44:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:44:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:44:35,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:35,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 266 transitions, 3770 flow. Second operand has 12 states, 12 states have (on average 63.416666666666664) internal successors, (761), 12 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:35,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:35,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:35,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:36,387 INFO L124 PetriNetUnfolderBase]: 749/1344 cut-off events. [2023-08-26 13:44:36,388 INFO L125 PetriNetUnfolderBase]: For 26507/26507 co-relation queries the response was YES. [2023-08-26 13:44:36,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10207 conditions, 1344 events. 749/1344 cut-off events. For 26507/26507 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7169 event pairs, 49 based on Foata normal form. 34/1378 useless extension candidates. Maximal degree in co-relation 10158. Up to 1015 conditions per place. [2023-08-26 13:44:36,411 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 242 selfloop transitions, 81 changer transitions 15/338 dead transitions. [2023-08-26 13:44:36,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 338 transitions, 5201 flow [2023-08-26 13:44:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 13:44:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 13:44:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1392 transitions. [2023-08-26 13:44:36,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.406660823838738 [2023-08-26 13:44:36,414 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1392 transitions. [2023-08-26 13:44:36,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1392 transitions. [2023-08-26 13:44:36,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:36,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1392 transitions. [2023-08-26 13:44:36,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.28571428571429) internal successors, (1392), 21 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:36,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:36,421 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:36,421 INFO L175 Difference]: Start difference. First operand has 157 places, 266 transitions, 3770 flow. Second operand 21 states and 1392 transitions. [2023-08-26 13:44:36,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 338 transitions, 5201 flow [2023-08-26 13:44:36,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 338 transitions, 5108 flow, removed 27 selfloop flow, removed 2 redundant places. [2023-08-26 13:44:36,498 INFO L231 Difference]: Finished difference. Result has 183 places, 281 transitions, 4259 flow [2023-08-26 13:44:36,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=3709, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4259, PETRI_PLACES=183, PETRI_TRANSITIONS=281} [2023-08-26 13:44:36,498 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 155 predicate places. [2023-08-26 13:44:36,498 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 281 transitions, 4259 flow [2023-08-26 13:44:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.416666666666664) internal successors, (761), 12 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:36,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:36,499 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:36,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:36,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 13:44:36,704 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:36,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash 594742522, now seen corresponding path program 12 times [2023-08-26 13:44:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:36,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697162451] [2023-08-26 13:44:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:36,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:36,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:36,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697162451] [2023-08-26 13:44:36,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697162451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:36,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024478696] [2023-08-26 13:44:36,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:44:36,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:36,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:36,847 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:36,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 13:44:36,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:44:36,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:36,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:44:36,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:37,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:37,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024478696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:37,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:37,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-26 13:44:37,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731603406] [2023-08-26 13:44:37,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:37,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 13:44:37,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 13:44:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-08-26 13:44:37,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:37,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 281 transitions, 4259 flow. Second operand has 21 states, 21 states have (on average 63.19047619047619) internal successors, (1327), 21 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:37,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:37,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:37,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:38,180 INFO L124 PetriNetUnfolderBase]: 998/1785 cut-off events. [2023-08-26 13:44:38,181 INFO L125 PetriNetUnfolderBase]: For 44906/44906 co-relation queries the response was YES. [2023-08-26 13:44:38,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14415 conditions, 1785 events. 998/1785 cut-off events. For 44906/44906 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10006 event pairs, 6 based on Foata normal form. 18/1803 useless extension candidates. Maximal degree in co-relation 14359. Up to 521 conditions per place. [2023-08-26 13:44:38,205 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 133 selfloop transitions, 330 changer transitions 30/493 dead transitions. [2023-08-26 13:44:38,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 493 transitions, 7984 flow [2023-08-26 13:44:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 13:44:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 13:44:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2233 transitions. [2023-08-26 13:44:38,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029231324431613 [2023-08-26 13:44:38,209 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2233 transitions. [2023-08-26 13:44:38,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2233 transitions. [2023-08-26 13:44:38,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:38,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2233 transitions. [2023-08-26 13:44:38,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 65.67647058823529) internal successors, (2233), 34 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:38,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:38,219 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:38,219 INFO L175 Difference]: Start difference. First operand has 183 places, 281 transitions, 4259 flow. Second operand 34 states and 2233 transitions. [2023-08-26 13:44:38,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 493 transitions, 7984 flow [2023-08-26 13:44:38,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 493 transitions, 7816 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-08-26 13:44:38,354 INFO L231 Difference]: Finished difference. Result has 218 places, 387 transitions, 6828 flow [2023-08-26 13:44:38,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6828, PETRI_PLACES=218, PETRI_TRANSITIONS=387} [2023-08-26 13:44:38,355 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 190 predicate places. [2023-08-26 13:44:38,355 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 387 transitions, 6828 flow [2023-08-26 13:44:38,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.19047619047619) internal successors, (1327), 21 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:38,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:38,355 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:38,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:38,561 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:38,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1472168882, now seen corresponding path program 13 times [2023-08-26 13:44:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:38,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766340575] [2023-08-26 13:44:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:38,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:38,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766340575] [2023-08-26 13:44:38,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766340575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:38,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821363957] [2023-08-26 13:44:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:44:38,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:38,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:38,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:38,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 13:44:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:38,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:44:38,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:38,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:39,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821363957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:39,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:39,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-26 13:44:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331356460] [2023-08-26 13:44:39,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:39,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:44:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:44:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-08-26 13:44:39,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:39,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 387 transitions, 6828 flow. Second operand has 22 states, 22 states have (on average 63.04545454545455) internal successors, (1387), 22 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:39,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:39,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:39,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:39,933 INFO L124 PetriNetUnfolderBase]: 1115/1928 cut-off events. [2023-08-26 13:44:39,933 INFO L125 PetriNetUnfolderBase]: For 68147/68147 co-relation queries the response was YES. [2023-08-26 13:44:39,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17666 conditions, 1928 events. 1115/1928 cut-off events. For 68147/68147 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10383 event pairs, 19 based on Foata normal form. 32/1960 useless extension candidates. Maximal degree in co-relation 17600. Up to 662 conditions per place. [2023-08-26 13:44:39,958 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 152 selfloop transitions, 368 changer transitions 2/522 dead transitions. [2023-08-26 13:44:39,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 522 transitions, 9746 flow [2023-08-26 13:44:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-26 13:44:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-26 13:44:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2095 transitions. [2023-08-26 13:44:39,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.401648773006135 [2023-08-26 13:44:39,962 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2095 transitions. [2023-08-26 13:44:39,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2095 transitions. [2023-08-26 13:44:39,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:39,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2095 transitions. [2023-08-26 13:44:39,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 65.46875) internal successors, (2095), 32 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:39,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:39,973 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 163.0) internal successors, (5379), 33 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:39,973 INFO L175 Difference]: Start difference. First operand has 218 places, 387 transitions, 6828 flow. Second operand 32 states and 2095 transitions. [2023-08-26 13:44:39,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 522 transitions, 9746 flow [2023-08-26 13:44:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 522 transitions, 9237 flow, removed 229 selfloop flow, removed 9 redundant places. [2023-08-26 13:44:40,205 INFO L231 Difference]: Finished difference. Result has 249 places, 456 transitions, 8797 flow [2023-08-26 13:44:40,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8797, PETRI_PLACES=249, PETRI_TRANSITIONS=456} [2023-08-26 13:44:40,206 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 221 predicate places. [2023-08-26 13:44:40,206 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 456 transitions, 8797 flow [2023-08-26 13:44:40,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.04545454545455) internal successors, (1387), 22 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:40,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:40,206 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:40,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-26 13:44:40,412 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:40,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash -803045918, now seen corresponding path program 14 times [2023-08-26 13:44:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:40,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87263341] [2023-08-26 13:44:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:40,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87263341] [2023-08-26 13:44:40,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87263341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:40,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953011785] [2023-08-26 13:44:40,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:44:40,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:40,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:40,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:40,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 13:44:40,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:44:40,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:40,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:44:40,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:40,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953011785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:40,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:40,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-26 13:44:40,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684324102] [2023-08-26 13:44:40,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:40,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 13:44:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 13:44:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-08-26 13:44:40,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:40,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 456 transitions, 8797 flow. Second operand has 21 states, 21 states have (on average 62.95238095238095) internal successors, (1322), 21 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:40,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:40,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:40,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:41,933 INFO L124 PetriNetUnfolderBase]: 1298/2209 cut-off events. [2023-08-26 13:44:41,934 INFO L125 PetriNetUnfolderBase]: For 103024/103024 co-relation queries the response was YES. [2023-08-26 13:44:41,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22847 conditions, 2209 events. 1298/2209 cut-off events. For 103024/103024 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12088 event pairs, 36 based on Foata normal form. 36/2245 useless extension candidates. Maximal degree in co-relation 22770. Up to 1051 conditions per place. [2023-08-26 13:44:41,959 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 169 selfloop transitions, 416 changer transitions 7/592 dead transitions. [2023-08-26 13:44:41,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 592 transitions, 12883 flow [2023-08-26 13:44:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 13:44:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 13:44:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1762 transitions. [2023-08-26 13:44:41,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40036355373778687 [2023-08-26 13:44:41,963 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1762 transitions. [2023-08-26 13:44:41,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1762 transitions. [2023-08-26 13:44:41,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:41,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1762 transitions. [2023-08-26 13:44:41,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.25925925925925) internal successors, (1762), 27 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:41,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:41,971 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:41,971 INFO L175 Difference]: Start difference. First operand has 249 places, 456 transitions, 8797 flow. Second operand 27 states and 1762 transitions. [2023-08-26 13:44:41,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 592 transitions, 12883 flow [2023-08-26 13:44:42,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 592 transitions, 12628 flow, removed 90 selfloop flow, removed 10 redundant places. [2023-08-26 13:44:42,284 INFO L231 Difference]: Finished difference. Result has 268 places, 545 transitions, 11985 flow [2023-08-26 13:44:42,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=8544, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11985, PETRI_PLACES=268, PETRI_TRANSITIONS=545} [2023-08-26 13:44:42,285 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 240 predicate places. [2023-08-26 13:44:42,285 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 545 transitions, 11985 flow [2023-08-26 13:44:42,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.95238095238095) internal successors, (1322), 21 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:42,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:42,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:42,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-26 13:44:42,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:42,491 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:42,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 55233966, now seen corresponding path program 15 times [2023-08-26 13:44:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:42,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462197470] [2023-08-26 13:44:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:42,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:42,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462197470] [2023-08-26 13:44:42,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462197470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:42,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195743877] [2023-08-26 13:44:42,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:44:42,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:42,617 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:42,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 13:44:42,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-26 13:44:42,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:42,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:44:42,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:42,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:42,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195743877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:42,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:42,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-26 13:44:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740157177] [2023-08-26 13:44:42,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:42,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:44:42,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:42,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:44:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-08-26 13:44:42,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:42,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 545 transitions, 11985 flow. Second operand has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:42,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:42,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:42,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:44,035 INFO L124 PetriNetUnfolderBase]: 1326/2301 cut-off events. [2023-08-26 13:44:44,035 INFO L125 PetriNetUnfolderBase]: For 133689/133689 co-relation queries the response was YES. [2023-08-26 13:44:44,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23728 conditions, 2301 events. 1326/2301 cut-off events. For 133689/133689 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13022 event pairs, 15 based on Foata normal form. 58/2359 useless extension candidates. Maximal degree in co-relation 23648. Up to 752 conditions per place. [2023-08-26 13:44:44,063 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 127 selfloop transitions, 491 changer transitions 6/624 dead transitions. [2023-08-26 13:44:44,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 624 transitions, 13761 flow [2023-08-26 13:44:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 13:44:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 13:44:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2353 transitions. [2023-08-26 13:44:44,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40098841172460803 [2023-08-26 13:44:44,068 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2353 transitions. [2023-08-26 13:44:44,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2353 transitions. [2023-08-26 13:44:44,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:44,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2353 transitions. [2023-08-26 13:44:44,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.36111111111111) internal successors, (2353), 36 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:44,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:44,078 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:44,078 INFO L175 Difference]: Start difference. First operand has 268 places, 545 transitions, 11985 flow. Second operand 36 states and 2353 transitions. [2023-08-26 13:44:44,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 624 transitions, 13761 flow [2023-08-26 13:44:44,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 624 transitions, 12792 flow, removed 369 selfloop flow, removed 13 redundant places. [2023-08-26 13:44:44,636 INFO L231 Difference]: Finished difference. Result has 290 places, 561 transitions, 12335 flow [2023-08-26 13:44:44,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=10536, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12335, PETRI_PLACES=290, PETRI_TRANSITIONS=561} [2023-08-26 13:44:44,637 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 262 predicate places. [2023-08-26 13:44:44,637 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 561 transitions, 12335 flow [2023-08-26 13:44:44,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:44,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:44,637 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:44,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-26 13:44:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:44,843 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:44,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash -139781126, now seen corresponding path program 16 times [2023-08-26 13:44:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:44,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000103408] [2023-08-26 13:44:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:44,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:44,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000103408] [2023-08-26 13:44:44,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000103408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:44,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705850585] [2023-08-26 13:44:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:44:44,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:44,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:44,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 13:44:45,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:44:45,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:45,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 13:44:45,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:45,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:45,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705850585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:45,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:45,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-26 13:44:45,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399013951] [2023-08-26 13:44:45,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:45,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:44:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:44:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:44:45,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:45,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 561 transitions, 12335 flow. Second operand has 20 states, 20 states have (on average 62.95) internal successors, (1259), 20 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:45,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:45,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:45,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:46,157 INFO L124 PetriNetUnfolderBase]: 1488/2567 cut-off events. [2023-08-26 13:44:46,157 INFO L125 PetriNetUnfolderBase]: For 44508/44508 co-relation queries the response was YES. [2023-08-26 13:44:46,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24867 conditions, 2567 events. 1488/2567 cut-off events. For 44508/44508 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14826 event pairs, 19 based on Foata normal form. 26/2593 useless extension candidates. Maximal degree in co-relation 24789. Up to 738 conditions per place. [2023-08-26 13:44:46,185 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 314 selfloop transitions, 389 changer transitions 12/715 dead transitions. [2023-08-26 13:44:46,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 715 transitions, 16065 flow [2023-08-26 13:44:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 13:44:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 13:44:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2354 transitions. [2023-08-26 13:44:46,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40115882753919563 [2023-08-26 13:44:46,189 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2354 transitions. [2023-08-26 13:44:46,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2354 transitions. [2023-08-26 13:44:46,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:46,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2354 transitions. [2023-08-26 13:44:46,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.38888888888889) internal successors, (2354), 36 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:46,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:46,199 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:46,199 INFO L175 Difference]: Start difference. First operand has 290 places, 561 transitions, 12335 flow. Second operand 36 states and 2354 transitions. [2023-08-26 13:44:46,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 715 transitions, 16065 flow [2023-08-26 13:44:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 715 transitions, 15500 flow, removed 96 selfloop flow, removed 23 redundant places. [2023-08-26 13:44:46,533 INFO L231 Difference]: Finished difference. Result has 312 places, 626 transitions, 14511 flow [2023-08-26 13:44:46,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=11794, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14511, PETRI_PLACES=312, PETRI_TRANSITIONS=626} [2023-08-26 13:44:46,534 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 284 predicate places. [2023-08-26 13:44:46,534 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 626 transitions, 14511 flow [2023-08-26 13:44:46,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.95) internal successors, (1259), 20 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:46,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:46,534 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:46,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:46,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 13:44:46,735 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:46,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash 738568328, now seen corresponding path program 17 times [2023-08-26 13:44:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:46,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516404691] [2023-08-26 13:44:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:46,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516404691] [2023-08-26 13:44:46,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516404691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995340486] [2023-08-26 13:44:46,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:44:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:46,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:46,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 13:44:46,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:44:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:46,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:44:46,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:47,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995340486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:47,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-26 13:44:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659863945] [2023-08-26 13:44:47,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 13:44:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 13:44:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-26 13:44:47,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:47,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 626 transitions, 14511 flow. Second operand has 23 states, 23 states have (on average 63.04347826086956) internal successors, (1450), 23 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:47,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:47,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:47,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:48,569 INFO L124 PetriNetUnfolderBase]: 1722/2981 cut-off events. [2023-08-26 13:44:48,569 INFO L125 PetriNetUnfolderBase]: For 53340/53340 co-relation queries the response was YES. [2023-08-26 13:44:48,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29683 conditions, 2981 events. 1722/2981 cut-off events. For 53340/53340 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 17810 event pairs, 19 based on Foata normal form. 12/2993 useless extension candidates. Maximal degree in co-relation 29599. Up to 881 conditions per place. [2023-08-26 13:44:48,596 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 250 selfloop transitions, 560 changer transitions 0/810 dead transitions. [2023-08-26 13:44:48,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 810 transitions, 19013 flow [2023-08-26 13:44:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 13:44:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 13:44:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2416 transitions. [2023-08-26 13:44:48,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40059691593433927 [2023-08-26 13:44:48,600 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2416 transitions. [2023-08-26 13:44:48,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2416 transitions. [2023-08-26 13:44:48,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:48,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2416 transitions. [2023-08-26 13:44:48,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.29729729729729) internal successors, (2416), 37 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:48,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 163.0) internal successors, (6194), 38 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:48,608 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 163.0) internal successors, (6194), 38 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:48,608 INFO L175 Difference]: Start difference. First operand has 312 places, 626 transitions, 14511 flow. Second operand 37 states and 2416 transitions. [2023-08-26 13:44:48,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 810 transitions, 19013 flow [2023-08-26 13:44:49,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 810 transitions, 18640 flow, removed 92 selfloop flow, removed 17 redundant places. [2023-08-26 13:44:49,024 INFO L231 Difference]: Finished difference. Result has 337 places, 736 transitions, 18215 flow [2023-08-26 13:44:49,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=14206, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18215, PETRI_PLACES=337, PETRI_TRANSITIONS=736} [2023-08-26 13:44:49,025 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 309 predicate places. [2023-08-26 13:44:49,025 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 736 transitions, 18215 flow [2023-08-26 13:44:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.04347826086956) internal successors, (1450), 23 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:49,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:49,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:49,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:49,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:49,231 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:49,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash -112040976, now seen corresponding path program 18 times [2023-08-26 13:44:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746455980] [2023-08-26 13:44:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:49,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:49,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746455980] [2023-08-26 13:44:49,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746455980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:49,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086393869] [2023-08-26 13:44:49,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:44:49,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:49,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:49,364 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:49,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 13:44:49,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:44:49,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:49,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 13:44:49,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:49,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:49,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086393869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:49,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:49,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-26 13:44:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430945506] [2023-08-26 13:44:49,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:49,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 13:44:49,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 13:44:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-08-26 13:44:49,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:49,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 736 transitions, 18215 flow. Second operand has 23 states, 23 states have (on average 63.130434782608695) internal successors, (1452), 23 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:49,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:49,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:49,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:51,122 INFO L124 PetriNetUnfolderBase]: 2064/3569 cut-off events. [2023-08-26 13:44:51,122 INFO L125 PetriNetUnfolderBase]: For 72870/72870 co-relation queries the response was YES. [2023-08-26 13:44:51,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37553 conditions, 3569 events. 2064/3569 cut-off events. For 72870/72870 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22158 event pairs, 11 based on Foata normal form. 34/3603 useless extension candidates. Maximal degree in co-relation 37463. Up to 945 conditions per place. [2023-08-26 13:44:51,235 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 191 selfloop transitions, 763 changer transitions 12/966 dead transitions. [2023-08-26 13:44:51,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 966 transitions, 24705 flow [2023-08-26 13:44:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 13:44:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 13:44:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2349 transitions. [2023-08-26 13:44:51,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003067484662577 [2023-08-26 13:44:51,238 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2349 transitions. [2023-08-26 13:44:51,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2349 transitions. [2023-08-26 13:44:51,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:51,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2349 transitions. [2023-08-26 13:44:51,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.25) internal successors, (2349), 36 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:51,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:51,247 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:51,247 INFO L175 Difference]: Start difference. First operand has 337 places, 736 transitions, 18215 flow. Second operand 36 states and 2349 transitions. [2023-08-26 13:44:51,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 966 transitions, 24705 flow [2023-08-26 13:44:51,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 966 transitions, 24241 flow, removed 93 selfloop flow, removed 12 redundant places. [2023-08-26 13:44:51,855 INFO L231 Difference]: Finished difference. Result has 371 places, 890 transitions, 23957 flow [2023-08-26 13:44:51,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=17836, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23957, PETRI_PLACES=371, PETRI_TRANSITIONS=890} [2023-08-26 13:44:51,855 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 343 predicate places. [2023-08-26 13:44:51,856 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 890 transitions, 23957 flow [2023-08-26 13:44:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.130434782608695) internal successors, (1452), 23 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:51,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:51,856 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:51,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 13:44:52,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:52,057 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:52,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1444408600, now seen corresponding path program 19 times [2023-08-26 13:44:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:52,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438445714] [2023-08-26 13:44:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:52,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:52,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438445714] [2023-08-26 13:44:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438445714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576695885] [2023-08-26 13:44:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:44:52,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:52,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:52,184 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:52,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 13:44:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:52,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:44:52,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:52,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:52,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576695885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:52,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:52,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-26 13:44:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886135725] [2023-08-26 13:44:52,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 13:44:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 13:44:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-08-26 13:44:52,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:52,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 890 transitions, 23957 flow. Second operand has 24 states, 24 states have (on average 62.958333333333336) internal successors, (1511), 24 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:52,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:52,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:52,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:54,683 INFO L124 PetriNetUnfolderBase]: 2807/4886 cut-off events. [2023-08-26 13:44:54,683 INFO L125 PetriNetUnfolderBase]: For 116949/116949 co-relation queries the response was YES. [2023-08-26 13:44:54,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55189 conditions, 4886 events. 2807/4886 cut-off events. For 116949/116949 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 32512 event pairs, 25 based on Foata normal form. 36/4922 useless extension candidates. Maximal degree in co-relation 55089. Up to 1253 conditions per place. [2023-08-26 13:44:54,748 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 430 selfloop transitions, 864 changer transitions 14/1308 dead transitions. [2023-08-26 13:44:54,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1308 transitions, 36216 flow [2023-08-26 13:44:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-26 13:44:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-26 13:44:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2804 transitions. [2023-08-26 13:44:54,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40005706948209446 [2023-08-26 13:44:54,826 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2804 transitions. [2023-08-26 13:44:54,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2804 transitions. [2023-08-26 13:44:54,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:54,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2804 transitions. [2023-08-26 13:44:54,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 65.20930232558139) internal successors, (2804), 43 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:54,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 163.0) internal successors, (7172), 44 states have internal predecessors, (7172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:54,849 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 163.0) internal successors, (7172), 44 states have internal predecessors, (7172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:54,849 INFO L175 Difference]: Start difference. First operand has 371 places, 890 transitions, 23957 flow. Second operand 43 states and 2804 transitions. [2023-08-26 13:44:54,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1308 transitions, 36216 flow [2023-08-26 13:44:55,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1308 transitions, 35423 flow, removed 266 selfloop flow, removed 17 redundant places. [2023-08-26 13:44:55,896 INFO L231 Difference]: Finished difference. Result has 408 places, 1217 transitions, 35028 flow [2023-08-26 13:44:55,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=23300, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=35028, PETRI_PLACES=408, PETRI_TRANSITIONS=1217} [2023-08-26 13:44:55,897 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 380 predicate places. [2023-08-26 13:44:55,897 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1217 transitions, 35028 flow [2023-08-26 13:44:55,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.958333333333336) internal successors, (1511), 24 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:55,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:44:55,897 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:44:55,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-26 13:44:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:56,098 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:44:56,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:44:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash 90410084, now seen corresponding path program 20 times [2023-08-26 13:44:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:44:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471685045] [2023-08-26 13:44:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:44:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:44:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:44:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:56,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:44:56,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471685045] [2023-08-26 13:44:56,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471685045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:44:56,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058750385] [2023-08-26 13:44:56,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:44:56,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:44:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:44:56,229 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:44:56,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 13:44:56,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:44:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:44:56,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:44:56,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:44:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:56,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:44:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:44:56,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058750385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:44:56,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:44:56,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-26 13:44:56,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693545868] [2023-08-26 13:44:56,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:44:56,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 13:44:56,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:44:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 13:44:56,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-08-26 13:44:56,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:44:56,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1217 transitions, 35028 flow. Second operand has 24 states, 24 states have (on average 62.791666666666664) internal successors, (1507), 24 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:56,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:44:56,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:44:56,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:44:58,945 INFO L124 PetriNetUnfolderBase]: 2956/5165 cut-off events. [2023-08-26 13:44:58,945 INFO L125 PetriNetUnfolderBase]: For 151624/151624 co-relation queries the response was YES. [2023-08-26 13:44:58,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62087 conditions, 5165 events. 2956/5165 cut-off events. For 151624/151624 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34853 event pairs, 103 based on Foata normal form. 82/5247 useless extension candidates. Maximal degree in co-relation 61976. Up to 4470 conditions per place. [2023-08-26 13:44:59,020 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 1177 selfloop transitions, 179 changer transitions 12/1368 dead transitions. [2023-08-26 13:44:59,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1368 transitions, 40496 flow [2023-08-26 13:44:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 13:44:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 13:44:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2367 transitions. [2023-08-26 13:44:59,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40337423312883436 [2023-08-26 13:44:59,024 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2367 transitions. [2023-08-26 13:44:59,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2367 transitions. [2023-08-26 13:44:59,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:44:59,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2367 transitions. [2023-08-26 13:44:59,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.75) internal successors, (2367), 36 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:59,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:59,033 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 163.0) internal successors, (6031), 37 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:44:59,033 INFO L175 Difference]: Start difference. First operand has 408 places, 1217 transitions, 35028 flow. Second operand 36 states and 2367 transitions. [2023-08-26 13:44:59,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1368 transitions, 40496 flow [2023-08-26 13:45:00,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1368 transitions, 39963 flow, removed 186 selfloop flow, removed 17 redundant places. [2023-08-26 13:45:00,797 INFO L231 Difference]: Finished difference. Result has 443 places, 1284 transitions, 37157 flow [2023-08-26 13:45:00,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=34350, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=37157, PETRI_PLACES=443, PETRI_TRANSITIONS=1284} [2023-08-26 13:45:00,798 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 415 predicate places. [2023-08-26 13:45:00,798 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1284 transitions, 37157 flow [2023-08-26 13:45:00,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.791666666666664) internal successors, (1507), 24 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:00,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:45:00,799 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:45:00,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 13:45:01,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 13:45:01,004 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:45:01,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:45:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1171454040, now seen corresponding path program 21 times [2023-08-26 13:45:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:45:01,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564864532] [2023-08-26 13:45:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:45:01,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:45:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:45:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564864532] [2023-08-26 13:45:01,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564864532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:45:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971241437] [2023-08-26 13:45:01,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:45:01,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:01,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:45:01,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:45:01,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 13:45:01,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-26 13:45:01,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:45:01,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:45:01,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:45:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:01,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:45:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971241437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:45:01,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:45:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-08-26 13:45:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187482966] [2023-08-26 13:45:01,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:45:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:45:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:45:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:45:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-08-26 13:45:01,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:45:01,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1284 transitions, 37157 flow. Second operand has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:01,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:45:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:45:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:45:03,696 INFO L124 PetriNetUnfolderBase]: 3030/5247 cut-off events. [2023-08-26 13:45:03,697 INFO L125 PetriNetUnfolderBase]: For 155809/155809 co-relation queries the response was YES. [2023-08-26 13:45:03,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64527 conditions, 5247 events. 3030/5247 cut-off events. For 155809/155809 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 35211 event pairs, 105 based on Foata normal form. 28/5275 useless extension candidates. Maximal degree in co-relation 64399. Up to 4667 conditions per place. [2023-08-26 13:45:03,773 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 1152 selfloop transitions, 218 changer transitions 8/1378 dead transitions. [2023-08-26 13:45:03,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1378 transitions, 42290 flow [2023-08-26 13:45:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 13:45:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 13:45:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1563 transitions. [2023-08-26 13:45:03,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995398773006135 [2023-08-26 13:45:03,775 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1563 transitions. [2023-08-26 13:45:03,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1563 transitions. [2023-08-26 13:45:03,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:45:03,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1563 transitions. [2023-08-26 13:45:03,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.125) internal successors, (1563), 24 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:03,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:03,780 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 163.0) internal successors, (4075), 25 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:03,780 INFO L175 Difference]: Start difference. First operand has 443 places, 1284 transitions, 37157 flow. Second operand 24 states and 1563 transitions. [2023-08-26 13:45:03,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1378 transitions, 42290 flow [2023-08-26 13:45:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1378 transitions, 41546 flow, removed 322 selfloop flow, removed 14 redundant places. [2023-08-26 13:45:05,973 INFO L231 Difference]: Finished difference. Result has 460 places, 1336 transitions, 38951 flow [2023-08-26 13:45:05,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=36521, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=38951, PETRI_PLACES=460, PETRI_TRANSITIONS=1336} [2023-08-26 13:45:05,979 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 432 predicate places. [2023-08-26 13:45:05,979 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 1336 transitions, 38951 flow [2023-08-26 13:45:05,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:05,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:45:05,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:45:05,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 13:45:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 13:45:06,184 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:45:06,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:45:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash -403812255, now seen corresponding path program 22 times [2023-08-26 13:45:06,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:45:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602296025] [2023-08-26 13:45:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:45:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:45:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:45:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602296025] [2023-08-26 13:45:06,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602296025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:45:06,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181422052] [2023-08-26 13:45:06,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:45:06,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:06,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:45:06,391 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:45:06,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 13:45:06,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:45:06,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:45:06,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:45:06,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:45:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:06,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:45:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:06,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181422052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:45:06,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:45:06,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 11 [2023-08-26 13:45:06,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634714161] [2023-08-26 13:45:06,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:45:06,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 13:45:06,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:45:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 13:45:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-26 13:45:06,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 163 [2023-08-26 13:45:06,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 1336 transitions, 38951 flow. Second operand has 13 states, 13 states have (on average 68.76923076923077) internal successors, (894), 13 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:06,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:45:06,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 163 [2023-08-26 13:45:06,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:45:09,644 INFO L124 PetriNetUnfolderBase]: 4071/7007 cut-off events. [2023-08-26 13:45:09,644 INFO L125 PetriNetUnfolderBase]: For 208467/208475 co-relation queries the response was YES. [2023-08-26 13:45:09,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86998 conditions, 7007 events. 4071/7007 cut-off events. For 208467/208475 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49204 event pairs, 113 based on Foata normal form. 9/7011 useless extension candidates. Maximal degree in co-relation 86862. Up to 4003 conditions per place. [2023-08-26 13:45:09,760 INFO L140 encePairwiseOnDemand]: 159/163 looper letters, 1181 selfloop transitions, 560 changer transitions 106/1857 dead transitions. [2023-08-26 13:45:09,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1857 transitions, 57232 flow [2023-08-26 13:45:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:45:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:45:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 522 transitions. [2023-08-26 13:45:09,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574934268185802 [2023-08-26 13:45:09,762 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 522 transitions. [2023-08-26 13:45:09,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 522 transitions. [2023-08-26 13:45:09,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:45:09,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 522 transitions. [2023-08-26 13:45:09,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:09,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:09,764 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:09,764 INFO L175 Difference]: Start difference. First operand has 460 places, 1336 transitions, 38951 flow. Second operand 7 states and 522 transitions. [2023-08-26 13:45:09,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1857 transitions, 57232 flow [2023-08-26 13:45:12,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1857 transitions, 56605 flow, removed 260 selfloop flow, removed 8 redundant places. [2023-08-26 13:45:12,527 INFO L231 Difference]: Finished difference. Result has 461 places, 1601 transitions, 48432 flow [2023-08-26 13:45:12,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38565, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=48432, PETRI_PLACES=461, PETRI_TRANSITIONS=1601} [2023-08-26 13:45:12,530 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 433 predicate places. [2023-08-26 13:45:12,531 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1601 transitions, 48432 flow [2023-08-26 13:45:12,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.76923076923077) internal successors, (894), 13 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:12,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:45:12,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:45:12,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 13:45:12,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 13:45:12,736 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:45:12,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:45:12,737 INFO L85 PathProgramCache]: Analyzing trace with hash -525565115, now seen corresponding path program 23 times [2023-08-26 13:45:12,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:45:12,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820216198] [2023-08-26 13:45:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:45:12,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:45:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:45:12,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820216198] [2023-08-26 13:45:12,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820216198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:45:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257689502] [2023-08-26 13:45:12,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:45:12,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:45:12,930 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:45:12,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 13:45:13,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-26 13:45:13,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:45:13,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 13:45:13,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:45:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:45:13,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:45:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:45:13,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257689502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:45:13,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:45:13,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2023-08-26 13:45:13,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599261123] [2023-08-26 13:45:13,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:45:13,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:45:13,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:45:13,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:45:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:45:13,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:45:13,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1601 transitions, 48432 flow. Second operand has 19 states, 19 states have (on average 63.10526315789474) internal successors, (1199), 19 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:13,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:45:13,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:45:13,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:45:17,359 INFO L124 PetriNetUnfolderBase]: 4256/7476 cut-off events. [2023-08-26 13:45:17,360 INFO L125 PetriNetUnfolderBase]: For 267241/267241 co-relation queries the response was YES. [2023-08-26 13:45:17,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96922 conditions, 7476 events. 4256/7476 cut-off events. For 267241/267241 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 54489 event pairs, 113 based on Foata normal form. 76/7552 useless extension candidates. Maximal degree in co-relation 96783. Up to 5266 conditions per place. [2023-08-26 13:45:17,498 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 1346 selfloop transitions, 511 changer transitions 44/1901 dead transitions. [2023-08-26 13:45:17,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1901 transitions, 59859 flow [2023-08-26 13:45:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 13:45:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 13:45:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2258 transitions. [2023-08-26 13:45:17,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40743413929989175 [2023-08-26 13:45:17,502 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2258 transitions. [2023-08-26 13:45:17,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2258 transitions. [2023-08-26 13:45:17,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:45:17,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2258 transitions. [2023-08-26 13:45:17,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.41176470588235) internal successors, (2258), 34 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:17,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:17,509 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 163.0) internal successors, (5705), 35 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:17,509 INFO L175 Difference]: Start difference. First operand has 461 places, 1601 transitions, 48432 flow. Second operand 34 states and 2258 transitions. [2023-08-26 13:45:17,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1901 transitions, 59859 flow [2023-08-26 13:45:20,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1901 transitions, 59528 flow, removed 143 selfloop flow, removed 3 redundant places. [2023-08-26 13:45:20,432 INFO L231 Difference]: Finished difference. Result has 503 places, 1741 transitions, 54513 flow [2023-08-26 13:45:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=48192, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=54513, PETRI_PLACES=503, PETRI_TRANSITIONS=1741} [2023-08-26 13:45:20,434 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 475 predicate places. [2023-08-26 13:45:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1741 transitions, 54513 flow [2023-08-26 13:45:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.10526315789474) internal successors, (1199), 19 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:45:20,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:45:20,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-26 13:45:20,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:20,641 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:45:20,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:45:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1009205269, now seen corresponding path program 24 times [2023-08-26 13:45:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:45:20,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425259972] [2023-08-26 13:45:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:45:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:45:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:20,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:45:20,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425259972] [2023-08-26 13:45:20,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425259972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:45:20,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270788415] [2023-08-26 13:45:20,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:45:20,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:45:20,798 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:45:20,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-26 13:45:20,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:45:20,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:45:20,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:45:20,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:45:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:21,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:45:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:45:21,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270788415] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:45:21,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:45:21,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-26 13:45:21,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249067852] [2023-08-26 13:45:21,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:45:21,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 13:45:21,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:45:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 13:45:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-08-26 13:45:21,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:45:21,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1741 transitions, 54513 flow. Second operand has 24 states, 24 states have (on average 62.791666666666664) internal successors, (1507), 24 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:21,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:45:21,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:45:21,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:45:25,997 INFO L124 PetriNetUnfolderBase]: 4561/8067 cut-off events. [2023-08-26 13:45:25,998 INFO L125 PetriNetUnfolderBase]: For 325860/325860 co-relation queries the response was YES. [2023-08-26 13:45:26,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107329 conditions, 8067 events. 4561/8067 cut-off events. For 325860/325860 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 59715 event pairs, 155 based on Foata normal form. 116/8183 useless extension candidates. Maximal degree in co-relation 107180. Up to 6640 conditions per place. [2023-08-26 13:45:26,117 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 1535 selfloop transitions, 395 changer transitions 7/1937 dead transitions. [2023-08-26 13:45:26,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1937 transitions, 64338 flow [2023-08-26 13:45:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 13:45:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 13:45:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1381 transitions. [2023-08-26 13:45:26,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034472684779433 [2023-08-26 13:45:26,118 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1381 transitions. [2023-08-26 13:45:26,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1381 transitions. [2023-08-26 13:45:26,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:45:26,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1381 transitions. [2023-08-26 13:45:26,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.76190476190476) internal successors, (1381), 21 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:26,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:26,122 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 163.0) internal successors, (3586), 22 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:26,122 INFO L175 Difference]: Start difference. First operand has 503 places, 1741 transitions, 54513 flow. Second operand 21 states and 1381 transitions. [2023-08-26 13:45:26,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1937 transitions, 64338 flow [2023-08-26 13:45:30,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1937 transitions, 61842 flow, removed 619 selfloop flow, removed 16 redundant places. [2023-08-26 13:45:30,303 INFO L231 Difference]: Finished difference. Result has 511 places, 1869 transitions, 58410 flow [2023-08-26 13:45:30,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=52245, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=58410, PETRI_PLACES=511, PETRI_TRANSITIONS=1869} [2023-08-26 13:45:30,305 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 483 predicate places. [2023-08-26 13:45:30,305 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1869 transitions, 58410 flow [2023-08-26 13:45:30,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.791666666666664) internal successors, (1507), 24 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:30,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:45:30,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:45:30,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-26 13:45:30,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:30,506 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:45:30,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:45:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 892060007, now seen corresponding path program 25 times [2023-08-26 13:45:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:45:30,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187793575] [2023-08-26 13:45:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:45:30,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:45:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:30,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:45:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187793575] [2023-08-26 13:45:30,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187793575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:45:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260833477] [2023-08-26 13:45:30,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:45:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:45:30,664 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:45:30,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-26 13:45:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:30,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:45:30,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:45:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:30,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:45:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:31,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260833477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:45:31,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:45:31,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-08-26 13:45:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948089787] [2023-08-26 13:45:31,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:45:31,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 13:45:31,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:45:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 13:45:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-26 13:45:31,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:45:31,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1869 transitions, 58410 flow. Second operand has 24 states, 24 states have (on average 62.708333333333336) internal successors, (1505), 24 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:45:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:45:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:45:36,139 INFO L124 PetriNetUnfolderBase]: 4748/8424 cut-off events. [2023-08-26 13:45:36,140 INFO L125 PetriNetUnfolderBase]: For 301489/301489 co-relation queries the response was YES. [2023-08-26 13:45:36,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110179 conditions, 8424 events. 4748/8424 cut-off events. For 301489/301489 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 63031 event pairs, 153 based on Foata normal form. 36/8460 useless extension candidates. Maximal degree in co-relation 110027. Up to 6532 conditions per place. [2023-08-26 13:45:36,270 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 1528 selfloop transitions, 485 changer transitions 13/2026 dead transitions. [2023-08-26 13:45:36,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 2026 transitions, 66488 flow [2023-08-26 13:45:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 13:45:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 13:45:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1767 transitions. [2023-08-26 13:45:36,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014996591683708 [2023-08-26 13:45:36,273 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1767 transitions. [2023-08-26 13:45:36,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1767 transitions. [2023-08-26 13:45:36,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:45:36,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1767 transitions. [2023-08-26 13:45:36,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.44444444444444) internal successors, (1767), 27 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:36,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:36,278 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 163.0) internal successors, (4564), 28 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:36,278 INFO L175 Difference]: Start difference. First operand has 511 places, 1869 transitions, 58410 flow. Second operand 27 states and 1767 transitions. [2023-08-26 13:45:36,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 2026 transitions, 66488 flow [2023-08-26 13:45:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2026 transitions, 65987 flow, removed 228 selfloop flow, removed 10 redundant places. [2023-08-26 13:45:40,060 INFO L231 Difference]: Finished difference. Result has 532 places, 1951 transitions, 62217 flow [2023-08-26 13:45:40,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=58013, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=62217, PETRI_PLACES=532, PETRI_TRANSITIONS=1951} [2023-08-26 13:45:40,062 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 504 predicate places. [2023-08-26 13:45:40,062 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1951 transitions, 62217 flow [2023-08-26 13:45:40,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.708333333333336) internal successors, (1505), 24 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:40,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:45:40,062 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:45:40,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-26 13:45:40,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-26 13:45:40,265 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:45:40,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:45:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1874982633, now seen corresponding path program 26 times [2023-08-26 13:45:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:45:40,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015673183] [2023-08-26 13:45:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:45:40,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:45:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:45:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015673183] [2023-08-26 13:45:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015673183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:45:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503702155] [2023-08-26 13:45:40,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:45:40,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:40,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:45:40,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:45:40,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-26 13:45:40,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:45:40,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:45:40,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:45:40,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:45:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:40,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:45:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:40,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503702155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:45:40,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:45:40,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-26 13:45:40,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567548978] [2023-08-26 13:45:40,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:45:40,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 13:45:40,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:45:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 13:45:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-08-26 13:45:40,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:45:40,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1951 transitions, 62217 flow. Second operand has 26 states, 26 states have (on average 62.96153846153846) internal successors, (1637), 26 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:40,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:45:40,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:45:40,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:45:47,719 INFO L124 PetriNetUnfolderBase]: 5790/10257 cut-off events. [2023-08-26 13:45:47,720 INFO L125 PetriNetUnfolderBase]: For 383248/383248 co-relation queries the response was YES. [2023-08-26 13:45:47,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135718 conditions, 10257 events. 5790/10257 cut-off events. For 383248/383248 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 78849 event pairs, 56 based on Foata normal form. 30/10287 useless extension candidates. Maximal degree in co-relation 135563. Up to 3601 conditions per place. [2023-08-26 13:45:47,881 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 481 selfloop transitions, 2177 changer transitions 55/2713 dead transitions. [2023-08-26 13:45:47,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 2713 transitions, 89571 flow [2023-08-26 13:45:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-26 13:45:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-26 13:45:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3016 transitions. [2023-08-26 13:45:47,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022405974926647 [2023-08-26 13:45:47,884 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3016 transitions. [2023-08-26 13:45:47,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3016 transitions. [2023-08-26 13:45:47,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:45:47,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3016 transitions. [2023-08-26 13:45:47,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 65.56521739130434) internal successors, (3016), 46 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:47,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 163.0) internal successors, (7661), 47 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:47,892 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 163.0) internal successors, (7661), 47 states have internal predecessors, (7661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:47,892 INFO L175 Difference]: Start difference. First operand has 532 places, 1951 transitions, 62217 flow. Second operand 46 states and 3016 transitions. [2023-08-26 13:45:47,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 2713 transitions, 89571 flow [2023-08-26 13:45:53,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 2713 transitions, 88782 flow, removed 259 selfloop flow, removed 13 redundant places. [2023-08-26 13:45:53,182 INFO L231 Difference]: Finished difference. Result has 575 places, 2508 transitions, 86078 flow [2023-08-26 13:45:53,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=61481, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=86078, PETRI_PLACES=575, PETRI_TRANSITIONS=2508} [2023-08-26 13:45:53,184 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 547 predicate places. [2023-08-26 13:45:53,184 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 2508 transitions, 86078 flow [2023-08-26 13:45:53,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.96153846153846) internal successors, (1637), 26 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:53,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:45:53,184 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:45:53,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-26 13:45:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-26 13:45:53,389 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:45:53,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:45:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 693587045, now seen corresponding path program 27 times [2023-08-26 13:45:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:45:53,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092567139] [2023-08-26 13:45:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:45:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:45:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:45:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:53,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:45:53,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092567139] [2023-08-26 13:45:53,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092567139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:45:53,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389009066] [2023-08-26 13:45:53,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:45:53,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:45:53,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:45:53,567 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:45:53,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-26 13:45:53,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:45:53,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:45:53,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:45:53,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:45:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:53,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:45:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:45:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389009066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:45:54,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:45:54,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-26 13:45:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957072216] [2023-08-26 13:45:54,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:45:54,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-26 13:45:54,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:45:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-26 13:45:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-08-26 13:45:54,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:45:54,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 2508 transitions, 86078 flow. Second operand has 27 states, 27 states have (on average 62.925925925925924) internal successors, (1699), 27 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:45:54,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:45:54,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:45:54,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:46:02,906 INFO L124 PetriNetUnfolderBase]: 6372/11226 cut-off events. [2023-08-26 13:46:02,906 INFO L125 PetriNetUnfolderBase]: For 452887/452887 co-relation queries the response was YES. [2023-08-26 13:46:03,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157288 conditions, 11226 events. 6372/11226 cut-off events. For 452887/452887 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 86495 event pairs, 109 based on Foata normal form. 50/11276 useless extension candidates. Maximal degree in co-relation 157121. Up to 3965 conditions per place. [2023-08-26 13:46:03,237 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 638 selfloop transitions, 2380 changer transitions 0/3018 dead transitions. [2023-08-26 13:46:03,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 3018 transitions, 106560 flow [2023-08-26 13:46:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-26 13:46:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-26 13:46:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4103 transitions. [2023-08-26 13:46:03,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39955204985879833 [2023-08-26 13:46:03,240 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4103 transitions. [2023-08-26 13:46:03,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4103 transitions. [2023-08-26 13:46:03,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:46:03,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4103 transitions. [2023-08-26 13:46:03,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 65.12698412698413) internal successors, (4103), 63 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:03,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 163.0) internal successors, (10432), 64 states have internal predecessors, (10432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:03,252 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 163.0) internal successors, (10432), 64 states have internal predecessors, (10432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:03,252 INFO L175 Difference]: Start difference. First operand has 575 places, 2508 transitions, 86078 flow. Second operand 63 states and 4103 transitions. [2023-08-26 13:46:03,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 3018 transitions, 106560 flow [2023-08-26 13:46:10,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 3018 transitions, 104386 flow, removed 1007 selfloop flow, removed 12 redundant places. [2023-08-26 13:46:10,563 INFO L231 Difference]: Finished difference. Result has 636 places, 2862 transitions, 103173 flow [2023-08-26 13:46:10,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=84677, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2037, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=103173, PETRI_PLACES=636, PETRI_TRANSITIONS=2862} [2023-08-26 13:46:10,565 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 608 predicate places. [2023-08-26 13:46:10,565 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 2862 transitions, 103173 flow [2023-08-26 13:46:10,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 62.925925925925924) internal successors, (1699), 27 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:10,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:46:10,566 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:46:10,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-26 13:46:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:46:10,766 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:46:10,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:46:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash -307925737, now seen corresponding path program 28 times [2023-08-26 13:46:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:46:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260402688] [2023-08-26 13:46:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:46:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:46:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:46:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:46:10,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:46:10,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260402688] [2023-08-26 13:46:10,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260402688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:46:10,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158349394] [2023-08-26 13:46:10,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:46:10,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:46:10,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:46:10,933 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:46:10,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-26 13:46:11,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:46:11,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:46:11,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:46:11,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:46:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:46:11,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:46:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:46:11,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158349394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:46:11,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:46:11,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-26 13:46:11,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342764610] [2023-08-26 13:46:11,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:46:11,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 13:46:11,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:46:11,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 13:46:11,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2023-08-26 13:46:11,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:46:11,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 2862 transitions, 103173 flow. Second operand has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:11,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:46:11,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:46:11,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:46:21,928 INFO L124 PetriNetUnfolderBase]: 7074/12384 cut-off events. [2023-08-26 13:46:21,928 INFO L125 PetriNetUnfolderBase]: For 487845/487845 co-relation queries the response was YES. [2023-08-26 13:46:22,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178859 conditions, 12384 events. 7074/12384 cut-off events. For 487845/487845 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 96276 event pairs, 83 based on Foata normal form. 26/12410 useless extension candidates. Maximal degree in co-relation 178680. Up to 3336 conditions per place. [2023-08-26 13:46:22,152 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 1214 selfloop transitions, 2146 changer transitions 33/3393 dead transitions. [2023-08-26 13:46:22,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 3393 transitions, 125043 flow [2023-08-26 13:46:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-26 13:46:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-26 13:46:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3711 transitions. [2023-08-26 13:46:22,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39941879237972233 [2023-08-26 13:46:22,156 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3711 transitions. [2023-08-26 13:46:22,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3711 transitions. [2023-08-26 13:46:22,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:46:22,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3711 transitions. [2023-08-26 13:46:22,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 65.10526315789474) internal successors, (3711), 57 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:22,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 163.0) internal successors, (9454), 58 states have internal predecessors, (9454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:22,163 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 163.0) internal successors, (9454), 58 states have internal predecessors, (9454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:22,164 INFO L175 Difference]: Start difference. First operand has 636 places, 2862 transitions, 103173 flow. Second operand 57 states and 3711 transitions. [2023-08-26 13:46:22,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 3393 transitions, 125043 flow [2023-08-26 13:46:33,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 3393 transitions, 122358 flow, removed 798 selfloop flow, removed 18 redundant places. [2023-08-26 13:46:33,240 INFO L231 Difference]: Finished difference. Result has 684 places, 3180 transitions, 118457 flow [2023-08-26 13:46:33,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=100728, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1837, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=118457, PETRI_PLACES=684, PETRI_TRANSITIONS=3180} [2023-08-26 13:46:33,243 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 656 predicate places. [2023-08-26 13:46:33,243 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 3180 transitions, 118457 flow [2023-08-26 13:46:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:33,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:46:33,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:46:33,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-26 13:46:33,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:46:33,444 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:46:33,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:46:33,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1631398103, now seen corresponding path program 29 times [2023-08-26 13:46:33,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:46:33,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290153706] [2023-08-26 13:46:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:46:33,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:46:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:46:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:46:33,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:46:33,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290153706] [2023-08-26 13:46:33,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290153706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:46:33,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542880564] [2023-08-26 13:46:33,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:46:33,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:46:33,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:46:33,609 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:46:33,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-26 13:46:33,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 13:46:33,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:46:33,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:46:33,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:46:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:46:33,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:46:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:46:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542880564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:46:33,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:46:33,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-26 13:46:33,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801949196] [2023-08-26 13:46:33,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:46:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-26 13:46:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:46:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-26 13:46:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2023-08-26 13:46:33,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:46:33,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 3180 transitions, 118457 flow. Second operand has 27 states, 27 states have (on average 62.851851851851855) internal successors, (1697), 27 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:33,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:46:33,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:46:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:46:49,122 INFO L124 PetriNetUnfolderBase]: 7893/13899 cut-off events. [2023-08-26 13:46:49,122 INFO L125 PetriNetUnfolderBase]: For 633420/633420 co-relation queries the response was YES. [2023-08-26 13:46:49,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204281 conditions, 13899 events. 7893/13899 cut-off events. For 633420/633420 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 110899 event pairs, 95 based on Foata normal form. 98/13997 useless extension candidates. Maximal degree in co-relation 204094. Up to 4795 conditions per place. [2023-08-26 13:46:49,464 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 525 selfloop transitions, 3214 changer transitions 7/3746 dead transitions. [2023-08-26 13:46:49,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 3746 transitions, 142433 flow [2023-08-26 13:46:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-08-26 13:46:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-08-26 13:46:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 6155 transitions. [2023-08-26 13:46:49,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39748143364546334 [2023-08-26 13:46:49,470 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 6155 transitions. [2023-08-26 13:46:49,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 6155 transitions. [2023-08-26 13:46:49,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:46:49,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 6155 transitions. [2023-08-26 13:46:49,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 64.78947368421052) internal successors, (6155), 95 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:49,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 163.0) internal successors, (15648), 96 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:49,483 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 163.0) internal successors, (15648), 96 states have internal predecessors, (15648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:46:49,483 INFO L175 Difference]: Start difference. First operand has 684 places, 3180 transitions, 118457 flow. Second operand 95 states and 6155 transitions. [2023-08-26 13:46:49,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 3746 transitions, 142433 flow [2023-08-26 13:47:03,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 751 places, 3746 transitions, 140820 flow, removed 479 selfloop flow, removed 27 redundant places. [2023-08-26 13:47:03,838 INFO L231 Difference]: Finished difference. Result has 765 places, 3585 transitions, 140717 flow [2023-08-26 13:47:03,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=116979, PETRI_DIFFERENCE_MINUEND_PLACES=657, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2815, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=140717, PETRI_PLACES=765, PETRI_TRANSITIONS=3585} [2023-08-26 13:47:03,840 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 737 predicate places. [2023-08-26 13:47:03,841 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 3585 transitions, 140717 flow [2023-08-26 13:47:03,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 62.851851851851855) internal successors, (1697), 27 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:03,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:47:03,841 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:47:03,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-26 13:47:04,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:47:04,042 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:47:04,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:47:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1514252841, now seen corresponding path program 30 times [2023-08-26 13:47:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:47:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461058129] [2023-08-26 13:47:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:47:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:47:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:47:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:47:04,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:47:04,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461058129] [2023-08-26 13:47:04,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461058129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:47:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922459791] [2023-08-26 13:47:04,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:47:04,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:47:04,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:47:04,223 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:47:04,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-26 13:47:04,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 13:47:04,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:47:04,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:47:04,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:47:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:47:04,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:47:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:47:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922459791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:47:04,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:47:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-26 13:47:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579377578] [2023-08-26 13:47:04,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:47:04,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-26 13:47:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:47:04,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-26 13:47:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2023-08-26 13:47:04,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:47:04,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 3585 transitions, 140717 flow. Second operand has 27 states, 27 states have (on average 62.888888888888886) internal successors, (1698), 27 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:04,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:47:04,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:47:04,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:47:21,830 INFO L124 PetriNetUnfolderBase]: 8200/14468 cut-off events. [2023-08-26 13:47:21,830 INFO L125 PetriNetUnfolderBase]: For 643329/643329 co-relation queries the response was YES. [2023-08-26 13:47:22,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221975 conditions, 14468 events. 8200/14468 cut-off events. For 643329/643329 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 116084 event pairs, 63 based on Foata normal form. 58/14526 useless extension candidates. Maximal degree in co-relation 221781. Up to 3391 conditions per place. [2023-08-26 13:47:22,123 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 538 selfloop transitions, 3328 changer transitions 26/3892 dead transitions. [2023-08-26 13:47:22,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 3892 transitions, 156557 flow [2023-08-26 13:47:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-26 13:47:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-26 13:47:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4034 transitions. [2023-08-26 13:47:22,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991688106075599 [2023-08-26 13:47:22,126 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4034 transitions. [2023-08-26 13:47:22,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4034 transitions. [2023-08-26 13:47:22,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:47:22,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4034 transitions. [2023-08-26 13:47:22,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 65.06451612903226) internal successors, (4034), 62 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:22,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 163.0) internal successors, (10269), 63 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:22,135 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 163.0) internal successors, (10269), 63 states have internal predecessors, (10269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:22,135 INFO L175 Difference]: Start difference. First operand has 765 places, 3585 transitions, 140717 flow. Second operand 62 states and 4034 transitions. [2023-08-26 13:47:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 3892 transitions, 156557 flow [2023-08-26 13:47:36,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 3892 transitions, 150057 flow, removed 948 selfloop flow, removed 50 redundant places. [2023-08-26 13:47:37,028 INFO L231 Difference]: Finished difference. Result has 781 places, 3739 transitions, 147697 flow [2023-08-26 13:47:37,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=134243, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=147697, PETRI_PLACES=781, PETRI_TRANSITIONS=3739} [2023-08-26 13:47:37,030 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 753 predicate places. [2023-08-26 13:47:37,030 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 3739 transitions, 147697 flow [2023-08-26 13:47:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 62.888888888888886) internal successors, (1698), 27 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:37,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:47:37,031 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:47:37,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-26 13:47:37,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-26 13:47:37,231 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:47:37,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:47:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash 850988049, now seen corresponding path program 31 times [2023-08-26 13:47:37,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:47:37,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61098394] [2023-08-26 13:47:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:47:37,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:47:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:47:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:47:37,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:47:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61098394] [2023-08-26 13:47:37,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61098394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:47:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149059630] [2023-08-26 13:47:37,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:47:37,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:47:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:47:37,401 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:47:37,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-26 13:47:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:47:37,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:47:37,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:47:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:47:37,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:47:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:47:37,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149059630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:47:37,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:47:37,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-08-26 13:47:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029769879] [2023-08-26 13:47:37,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:47:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 13:47:37,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:47:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 13:47:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2023-08-26 13:47:37,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:47:37,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 3739 transitions, 147697 flow. Second operand has 26 states, 26 states have (on average 62.76923076923077) internal successors, (1632), 26 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:37,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:47:37,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:47:37,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:47:53,656 INFO L124 PetriNetUnfolderBase]: 8335/14495 cut-off events. [2023-08-26 13:47:53,656 INFO L125 PetriNetUnfolderBase]: For 683986/683986 co-relation queries the response was YES. [2023-08-26 13:47:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228715 conditions, 14495 events. 8335/14495 cut-off events. For 683986/683986 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 114468 event pairs, 314 based on Foata normal form. 74/14569 useless extension candidates. Maximal degree in co-relation 228523. Up to 7419 conditions per place. [2023-08-26 13:47:53,944 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 923 selfloop transitions, 2967 changer transitions 5/3895 dead transitions. [2023-08-26 13:47:53,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 3895 transitions, 159675 flow [2023-08-26 13:47:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 13:47:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 13:47:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2670 transitions. [2023-08-26 13:47:53,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995211731258417 [2023-08-26 13:47:53,947 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2670 transitions. [2023-08-26 13:47:53,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2670 transitions. [2023-08-26 13:47:53,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:47:53,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2670 transitions. [2023-08-26 13:47:53,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.1219512195122) internal successors, (2670), 41 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:53,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 163.0) internal successors, (6846), 42 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:53,958 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 163.0) internal successors, (6846), 42 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:47:53,958 INFO L175 Difference]: Start difference. First operand has 781 places, 3739 transitions, 147697 flow. Second operand 41 states and 2670 transitions. [2023-08-26 13:47:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 3895 transitions, 159675 flow [2023-08-26 13:48:10,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 786 places, 3895 transitions, 157385 flow, removed 557 selfloop flow, removed 35 redundant places. [2023-08-26 13:48:10,500 INFO L231 Difference]: Finished difference. Result has 792 places, 3819 transitions, 156941 flow [2023-08-26 13:48:10,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=143379, PETRI_DIFFERENCE_MINUEND_PLACES=746, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=156941, PETRI_PLACES=792, PETRI_TRANSITIONS=3819} [2023-08-26 13:48:10,503 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 764 predicate places. [2023-08-26 13:48:10,503 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 3819 transitions, 156941 flow [2023-08-26 13:48:10,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.76923076923077) internal successors, (1632), 26 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:10,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:10,504 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:48:10,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-26 13:48:10,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 13:48:10,704 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:48:10,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -876446623, now seen corresponding path program 32 times [2023-08-26 13:48:10,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:10,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663676510] [2023-08-26 13:48:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:10,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:10,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663676510] [2023-08-26 13:48:10,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663676510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:48:10,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506542262] [2023-08-26 13:48:10,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:48:10,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:48:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:48:10,884 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:48:10,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-26 13:48:10,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:48:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:48:10,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:48:10,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:48:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:11,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:48:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:11,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506542262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:48:11,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:48:11,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-26 13:48:11,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244301586] [2023-08-26 13:48:11,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:48:11,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-26 13:48:11,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-26 13:48:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-08-26 13:48:11,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:48:11,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 3819 transitions, 156941 flow. Second operand has 28 states, 28 states have (on average 62.92857142857143) internal successors, (1762), 28 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:11,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:11,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:48:11,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:48:29,095 INFO L124 PetriNetUnfolderBase]: 8991/15667 cut-off events. [2023-08-26 13:48:29,095 INFO L125 PetriNetUnfolderBase]: For 757887/757887 co-relation queries the response was YES. [2023-08-26 13:48:29,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253199 conditions, 15667 events. 8991/15667 cut-off events. For 757887/757887 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 125366 event pairs, 89 based on Foata normal form. 28/15695 useless extension candidates. Maximal degree in co-relation 253005. Up to 4468 conditions per place. [2023-08-26 13:48:29,410 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 761 selfloop transitions, 3454 changer transitions 20/4235 dead transitions. [2023-08-26 13:48:29,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 4235 transitions, 178761 flow [2023-08-26 13:48:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-26 13:48:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-26 13:48:29,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3197 transitions. [2023-08-26 13:48:29,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40027544760235384 [2023-08-26 13:48:29,413 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3197 transitions. [2023-08-26 13:48:29,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3197 transitions. [2023-08-26 13:48:29,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:48:29,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3197 transitions. [2023-08-26 13:48:29,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 65.24489795918367) internal successors, (3197), 49 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:29,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 163.0) internal successors, (8150), 50 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:29,420 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 163.0) internal successors, (8150), 50 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:29,420 INFO L175 Difference]: Start difference. First operand has 792 places, 3819 transitions, 156941 flow. Second operand 49 states and 3197 transitions. [2023-08-26 13:48:29,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 4235 transitions, 178761 flow [2023-08-26 13:48:48,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 815 places, 4235 transitions, 176798 flow, removed 460 selfloop flow, removed 24 redundant places. [2023-08-26 13:48:48,876 INFO L231 Difference]: Finished difference. Result has 825 places, 4105 transitions, 176165 flow [2023-08-26 13:48:48,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=155064, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=176165, PETRI_PLACES=825, PETRI_TRANSITIONS=4105} [2023-08-26 13:48:48,880 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 797 predicate places. [2023-08-26 13:48:48,880 INFO L495 AbstractCegarLoop]: Abstraction has has 825 places, 4105 transitions, 176165 flow [2023-08-26 13:48:48,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 62.92857142857143) internal successors, (1762), 28 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:48,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:48:48,881 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:48:48,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-26 13:48:49,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 13:48:49,086 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:48:49,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:48:49,087 INFO L85 PathProgramCache]: Analyzing trace with hash 34769785, now seen corresponding path program 33 times [2023-08-26 13:48:49,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:48:49,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027138112] [2023-08-26 13:48:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:48:49,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:48:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:48:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:49,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:48:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027138112] [2023-08-26 13:48:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027138112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:48:49,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8145818] [2023-08-26 13:48:49,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:48:49,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:48:49,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:48:49,236 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:48:49,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-26 13:48:49,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:48:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:48:49,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:48:49,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:48:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:49,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:48:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:48:49,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8145818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:48:49,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:48:49,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-26 13:48:49,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295040004] [2023-08-26 13:48:49,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:48:49,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-26 13:48:49,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:48:49,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-26 13:48:49,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2023-08-26 13:48:49,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:48:49,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 825 places, 4105 transitions, 176165 flow. Second operand has 28 states, 28 states have (on average 62.857142857142854) internal successors, (1760), 28 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:48:49,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:48:49,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:48:49,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:49:11,768 INFO L124 PetriNetUnfolderBase]: 9575/16743 cut-off events. [2023-08-26 13:49:11,768 INFO L125 PetriNetUnfolderBase]: For 861174/861174 co-relation queries the response was YES. [2023-08-26 13:49:12,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280818 conditions, 16743 events. 9575/16743 cut-off events. For 861174/861174 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 135584 event pairs, 137 based on Foata normal form. 10/16753 useless extension candidates. Maximal degree in co-relation 280615. Up to 5300 conditions per place. [2023-08-26 13:49:12,142 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 992 selfloop transitions, 3563 changer transitions 0/4555 dead transitions. [2023-08-26 13:49:12,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 4555 transitions, 199154 flow [2023-08-26 13:49:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-26 13:49:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-26 13:49:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4686 transitions. [2023-08-26 13:49:12,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992842535787321 [2023-08-26 13:49:12,145 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4686 transitions. [2023-08-26 13:49:12,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4686 transitions. [2023-08-26 13:49:12,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:49:12,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4686 transitions. [2023-08-26 13:49:12,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 65.08333333333333) internal successors, (4686), 72 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:12,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 163.0) internal successors, (11899), 73 states have internal predecessors, (11899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:12,153 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 163.0) internal successors, (11899), 73 states have internal predecessors, (11899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:12,153 INFO L175 Difference]: Start difference. First operand has 825 places, 4105 transitions, 176165 flow. Second operand 72 states and 4686 transitions. [2023-08-26 13:49:12,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 4555 transitions, 199154 flow [2023-08-26 13:49:40,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 877 places, 4555 transitions, 195943 flow, removed 349 selfloop flow, removed 19 redundant places. [2023-08-26 13:49:40,692 INFO L231 Difference]: Finished difference. Result has 882 places, 4386 transitions, 194779 flow [2023-08-26 13:49:40,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=173168, PETRI_DIFFERENCE_MINUEND_PLACES=806, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=194779, PETRI_PLACES=882, PETRI_TRANSITIONS=4386} [2023-08-26 13:49:40,695 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 854 predicate places. [2023-08-26 13:49:40,695 INFO L495 AbstractCegarLoop]: Abstraction has has 882 places, 4386 transitions, 194779 flow [2023-08-26 13:49:40,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 62.857142857142854) internal successors, (1760), 28 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:40,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:49:40,696 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:49:40,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-26 13:49:40,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-26 13:49:40,903 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:49:40,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:49:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1602194263, now seen corresponding path program 34 times [2023-08-26 13:49:40,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:49:40,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272395539] [2023-08-26 13:49:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:49:40,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:49:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:49:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:49:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272395539] [2023-08-26 13:49:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272395539] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:49:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013951953] [2023-08-26 13:49:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:49:41,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:49:41,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:49:41,050 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:49:41,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-26 13:49:41,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:49:41,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:49:41,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 13:49:41,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:49:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:41,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:49:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:49:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013951953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:49:41,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:49:41,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2023-08-26 13:49:41,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241317353] [2023-08-26 13:49:41,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:49:41,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 13:49:41,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:49:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 13:49:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-08-26 13:49:41,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:49:41,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 882 places, 4386 transitions, 194779 flow. Second operand has 26 states, 26 states have (on average 62.73076923076923) internal successors, (1631), 26 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:49:41,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:49:41,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:49:41,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:50:06,251 INFO L124 PetriNetUnfolderBase]: 11465/19999 cut-off events. [2023-08-26 13:50:06,251 INFO L125 PetriNetUnfolderBase]: For 1105918/1105918 co-relation queries the response was YES. [2023-08-26 13:50:06,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344244 conditions, 19999 events. 11465/19999 cut-off events. For 1105918/1105918 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 166422 event pairs, 79 based on Foata normal form. 116/20115 useless extension candidates. Maximal degree in co-relation 344040. Up to 4816 conditions per place. [2023-08-26 13:50:06,751 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 1514 selfloop transitions, 3790 changer transitions 71/5375 dead transitions. [2023-08-26 13:50:06,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 5375 transitions, 245238 flow [2023-08-26 13:50:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-26 13:50:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-26 13:50:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3330 transitions. [2023-08-26 13:50:06,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40057740887766147 [2023-08-26 13:50:06,754 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3330 transitions. [2023-08-26 13:50:06,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3330 transitions. [2023-08-26 13:50:06,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:50:06,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3330 transitions. [2023-08-26 13:50:06,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 65.29411764705883) internal successors, (3330), 51 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:50:06,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 163.0) internal successors, (8476), 52 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:50:06,763 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 163.0) internal successors, (8476), 52 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:50:06,763 INFO L175 Difference]: Start difference. First operand has 882 places, 4386 transitions, 194779 flow. Second operand 51 states and 3330 transitions. [2023-08-26 13:50:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 5375 transitions, 245238 flow [2023-08-26 13:50:46,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 913 places, 5375 transitions, 241963 flow, removed 379 selfloop flow, removed 18 redundant places. [2023-08-26 13:50:46,404 INFO L231 Difference]: Finished difference. Result has 927 places, 5200 transitions, 239668 flow [2023-08-26 13:50:46,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=191678, PETRI_DIFFERENCE_MINUEND_PLACES=863, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2977, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=239668, PETRI_PLACES=927, PETRI_TRANSITIONS=5200} [2023-08-26 13:50:46,409 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 899 predicate places. [2023-08-26 13:50:46,409 INFO L495 AbstractCegarLoop]: Abstraction has has 927 places, 5200 transitions, 239668 flow [2023-08-26 13:50:46,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.73076923076923) internal successors, (1631), 26 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:50:46,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:50:46,409 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:50:46,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-26 13:50:46,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:50:46,614 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:50:46,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:50:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash 388970985, now seen corresponding path program 35 times [2023-08-26 13:50:46,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:50:46,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560969105] [2023-08-26 13:50:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:50:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:50:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:50:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:50:46,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:50:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560969105] [2023-08-26 13:50:46,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560969105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:50:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224256989] [2023-08-26 13:50:46,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:50:46,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:50:46,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:50:46,801 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:50:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-26 13:50:46,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:50:46,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:50:46,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:50:46,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:50:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:50:47,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:50:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:50:47,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224256989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:50:47,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:50:47,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-26 13:50:47,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770190397] [2023-08-26 13:50:47,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:50:47,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 13:50:47,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:50:47,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 13:50:47,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-08-26 13:50:47,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:50:47,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 5200 transitions, 239668 flow. Second operand has 29 states, 29 states have (on average 62.827586206896555) internal successors, (1822), 29 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:50:47,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:50:47,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:50:47,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:23,721 INFO L124 PetriNetUnfolderBase]: 11960/20924 cut-off events. [2023-08-26 13:51:23,721 INFO L125 PetriNetUnfolderBase]: For 1242509/1242509 co-relation queries the response was YES. [2023-08-26 13:51:24,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374406 conditions, 20924 events. 11960/20924 cut-off events. For 1242509/1242509 co-relation queries the response was YES. Maximal size of possible extension queue 1440. Compared 175759 event pairs, 189 based on Foata normal form. 18/20942 useless extension candidates. Maximal degree in co-relation 374191. Up to 6506 conditions per place. [2023-08-26 13:51:24,261 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 1561 selfloop transitions, 4027 changer transitions 26/5614 dead transitions. [2023-08-26 13:51:24,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 5614 transitions, 265370 flow [2023-08-26 13:51:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-26 13:51:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-26 13:51:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3586 transitions. [2023-08-26 13:51:24,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-26 13:51:24,264 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3586 transitions. [2023-08-26 13:51:24,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3586 transitions. [2023-08-26 13:51:24,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:24,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3586 transitions. [2023-08-26 13:51:24,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 65.2) internal successors, (3586), 55 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:24,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 163.0) internal successors, (9128), 56 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:24,272 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 163.0) internal successors, (9128), 56 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:24,272 INFO L175 Difference]: Start difference. First operand has 927 places, 5200 transitions, 239668 flow. Second operand 55 states and 3586 transitions. [2023-08-26 13:51:24,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 5614 transitions, 265370 flow [2023-08-26 13:52:19,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 962 places, 5614 transitions, 262935 flow, removed 982 selfloop flow, removed 19 redundant places. [2023-08-26 13:52:19,994 INFO L231 Difference]: Finished difference. Result has 972 places, 5468 transitions, 260386 flow [2023-08-26 13:52:19,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=237400, PETRI_DIFFERENCE_MINUEND_PLACES=908, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3734, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=260386, PETRI_PLACES=972, PETRI_TRANSITIONS=5468} [2023-08-26 13:52:19,998 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 944 predicate places. [2023-08-26 13:52:19,999 INFO L495 AbstractCegarLoop]: Abstraction has has 972 places, 5468 transitions, 260386 flow [2023-08-26 13:52:19,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 62.827586206896555) internal successors, (1822), 29 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:19,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:52:19,999 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:52:20,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-26 13:52:20,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-26 13:52:20,205 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:52:20,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:52:20,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1776283125, now seen corresponding path program 36 times [2023-08-26 13:52:20,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:52:20,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469140926] [2023-08-26 13:52:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:52:20,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:52:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:52:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:52:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:52:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469140926] [2023-08-26 13:52:20,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469140926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:52:20,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967741750] [2023-08-26 13:52:20,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:52:20,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:52:20,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:52:20,377 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:52:20,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-26 13:52:20,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:52:20,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:52:20,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:52:20,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:52:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:52:20,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:52:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:52:20,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967741750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:52:20,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:52:20,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-26 13:52:20,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319424155] [2023-08-26 13:52:20,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:52:20,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-26 13:52:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:52:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-26 13:52:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-26 13:52:20,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:52:20,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 972 places, 5468 transitions, 260386 flow. Second operand has 30 states, 30 states have (on average 62.833333333333336) internal successors, (1885), 30 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:20,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:52:20,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:52:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:53:21,494 INFO L124 PetriNetUnfolderBase]: 15805/27715 cut-off events. [2023-08-26 13:53:21,494 INFO L125 PetriNetUnfolderBase]: For 1811720/1811720 co-relation queries the response was YES. [2023-08-26 13:53:22,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509054 conditions, 27715 events. 15805/27715 cut-off events. For 1811720/1811720 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 242837 event pairs, 227 based on Foata normal form. 56/27771 useless extension candidates. Maximal degree in co-relation 508829. Up to 6758 conditions per place. [2023-08-26 13:53:23,025 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 2476 selfloop transitions, 4819 changer transitions 65/7360 dead transitions. [2023-08-26 13:53:23,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1045 places, 7360 transitions, 361675 flow [2023-08-26 13:53:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-26 13:53:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-26 13:53:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4821 transitions. [2023-08-26 13:53:23,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996849610346543 [2023-08-26 13:53:23,030 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4821 transitions. [2023-08-26 13:53:23,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4821 transitions. [2023-08-26 13:53:23,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:53:23,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4821 transitions. [2023-08-26 13:53:23,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 65.14864864864865) internal successors, (4821), 74 states have internal predecessors, (4821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:23,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 163.0) internal successors, (12225), 75 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:23,042 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 163.0) internal successors, (12225), 75 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:23,042 INFO L175 Difference]: Start difference. First operand has 972 places, 5468 transitions, 260386 flow. Second operand 74 states and 4821 transitions. [2023-08-26 13:53:23,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1045 places, 7360 transitions, 361675 flow [2023-08-26 13:54:59,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1032 places, 7360 transitions, 359918 flow, removed 582 selfloop flow, removed 13 redundant places. [2023-08-26 13:54:59,939 INFO L231 Difference]: Finished difference. Result has 1047 places, 7153 transitions, 356974 flow [2023-08-26 13:54:59,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=259165, PETRI_DIFFERENCE_MINUEND_PLACES=959, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=356974, PETRI_PLACES=1047, PETRI_TRANSITIONS=7153} [2023-08-26 13:54:59,943 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1019 predicate places. [2023-08-26 13:54:59,943 INFO L495 AbstractCegarLoop]: Abstraction has has 1047 places, 7153 transitions, 356974 flow [2023-08-26 13:54:59,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.833333333333336) internal successors, (1885), 30 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:54:59,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:54:59,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:54:59,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-26 13:55:00,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:55:00,144 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:55:00,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:55:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1297790506, now seen corresponding path program 37 times [2023-08-26 13:55:00,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:55:00,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255179157] [2023-08-26 13:55:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:55:00,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:55:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:55:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:55:00,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:55:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255179157] [2023-08-26 13:55:00,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255179157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:55:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545849399] [2023-08-26 13:55:00,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:55:00,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:55:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:55:00,317 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:55:00,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-26 13:55:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:55:00,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:55:00,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:55:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:55:00,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:55:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:55:00,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545849399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:55:00,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:55:00,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-26 13:55:00,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895635158] [2023-08-26 13:55:00,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:55:00,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 13:55:00,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:55:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 13:55:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2023-08-26 13:55:00,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:55:00,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1047 places, 7153 transitions, 356974 flow. Second operand has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:55:00,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:55:00,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:55:00,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:56:00,007 INFO L124 PetriNetUnfolderBase]: 15835/27619 cut-off events. [2023-08-26 13:56:00,008 INFO L125 PetriNetUnfolderBase]: For 1934319/1934319 co-relation queries the response was YES. [2023-08-26 13:56:00,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529788 conditions, 27619 events. 15835/27619 cut-off events. For 1934319/1934319 co-relation queries the response was YES. Maximal size of possible extension queue 1768. Compared 239796 event pairs, 841 based on Foata normal form. 74/27693 useless extension candidates. Maximal degree in co-relation 529549. Up to 25991 conditions per place. [2023-08-26 13:56:00,936 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 6617 selfloop transitions, 639 changer transitions 7/7263 dead transitions. [2023-08-26 13:56:00,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1068 places, 7263 transitions, 375350 flow [2023-08-26 13:56:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 13:56:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 13:56:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1499 transitions. [2023-08-26 13:56:00,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39983995732195254 [2023-08-26 13:56:00,938 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1499 transitions. [2023-08-26 13:56:00,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1499 transitions. [2023-08-26 13:56:00,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:56:00,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1499 transitions. [2023-08-26 13:56:00,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 65.17391304347827) internal successors, (1499), 23 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:56:00,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:56:00,940 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:56:00,940 INFO L175 Difference]: Start difference. First operand has 1047 places, 7153 transitions, 356974 flow. Second operand 23 states and 1499 transitions. [2023-08-26 13:56:00,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1068 places, 7263 transitions, 375350 flow [2023-08-26 13:57:55,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1046 places, 7263 transitions, 373563 flow, removed 704 selfloop flow, removed 22 redundant places. [2023-08-26 13:57:55,697 INFO L231 Difference]: Finished difference. Result has 1058 places, 7221 transitions, 360689 flow [2023-08-26 13:57:55,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=353101, PETRI_DIFFERENCE_MINUEND_PLACES=1024, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=360689, PETRI_PLACES=1058, PETRI_TRANSITIONS=7221} [2023-08-26 13:57:55,701 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1030 predicate places. [2023-08-26 13:57:55,701 INFO L495 AbstractCegarLoop]: Abstraction has has 1058 places, 7221 transitions, 360689 flow [2023-08-26 13:57:55,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.65384615384615) internal successors, (1629), 26 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:57:55,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:57:55,702 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:57:55,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-26 13:57:55,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:57:55,902 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:57:55,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:57:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1052462947, now seen corresponding path program 38 times [2023-08-26 13:57:55,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:57:55,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63128387] [2023-08-26 13:57:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:57:55,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:57:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:57:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:57:56,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:57:56,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63128387] [2023-08-26 13:57:56,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63128387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:57:56,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086255129] [2023-08-26 13:57:56,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:57:56,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:57:56,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:57:56,065 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:57:56,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-26 13:57:56,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:57:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:57:56,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:57:56,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:57:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:57:56,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:57:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:57:56,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086255129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:57:56,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:57:56,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-26 13:57:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753838509] [2023-08-26 13:57:56,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:57:56,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 13:57:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:57:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 13:57:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-08-26 13:57:56,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 163 [2023-08-26 13:57:56,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1058 places, 7221 transitions, 360689 flow. Second operand has 29 states, 29 states have (on average 62.89655172413793) internal successors, (1824), 29 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:57:56,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:57:56,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 163 [2023-08-26 13:57:56,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 13:57:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:57:58,132 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 13:57:58,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-26 13:57:58,174 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 13:57:58,174 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 13:57:58,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-26 13:57:58,333 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 13:57:58,334 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 13:57:58,335 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 13:57:58,335 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 13:57:58,335 INFO L445 BasicCegarLoop]: Path program histogram: [38, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:57:58,337 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:57:58,337 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:57:58,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:57:58 BasicIcfg [2023-08-26 13:57:58,339 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:57:58,339 INFO L158 Benchmark]: Toolchain (without parser) took 817428.09ms. Allocated memory was 343.9MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 321.0MB in the beginning and 5.8GB in the end (delta: -5.4GB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. [2023-08-26 13:57:58,339 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 343.9MB. Free memory is still 320.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:57:58,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.86ms. Allocated memory is still 343.9MB. Free memory was 320.5MB in the beginning and 310.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:57:58,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.63ms. Allocated memory is still 343.9MB. Free memory was 310.0MB in the beginning and 308.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:57:58,340 INFO L158 Benchmark]: Boogie Preprocessor took 33.71ms. Allocated memory is still 343.9MB. Free memory was 308.4MB in the beginning and 307.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:57:58,340 INFO L158 Benchmark]: RCFGBuilder took 438.49ms. Allocated memory is still 343.9MB. Free memory was 306.9MB in the beginning and 291.7MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 13:57:58,340 INFO L158 Benchmark]: TraceAbstraction took 816667.15ms. Allocated memory was 343.9MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 291.1MB in the beginning and 5.8GB in the end (delta: -5.5GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-08-26 13:57:58,341 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 343.9MB. Free memory is still 320.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 239.86ms. Allocated memory is still 343.9MB. Free memory was 320.5MB in the beginning and 310.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.63ms. Allocated memory is still 343.9MB. Free memory was 310.0MB in the beginning and 308.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.71ms. Allocated memory is still 343.9MB. Free memory was 308.4MB in the beginning and 307.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 438.49ms. Allocated memory is still 343.9MB. Free memory was 306.9MB in the beginning and 291.7MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 816667.15ms. Allocated memory was 343.9MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 291.1MB in the beginning and 5.8GB in the end (delta: -5.5GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 76 PlacesBefore, 28 PlacesAfterwards, 75 TransitionsBefore, 23 TransitionsAfterwards, 580 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 77 TotalNumberOfCompositions, 664 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 645, independent: 643, independent conditional: 0, independent unconditional: 643, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 300, independent: 298, independent conditional: 0, independent unconditional: 298, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 645, independent: 345, independent conditional: 0, independent unconditional: 345, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 300, unknown conditional: 0, unknown unconditional: 300] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (29states, 61/163 universal loopers) in iteration 45,while PetriNetUnfolder was constructing finite prefix that currently has 5608 conditions, 402 events (183/401 cut-off events. For 26070/26070 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 2655 event pairs, 3 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 5359. Up to 232 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 99 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 816.5s, OverallIterations: 45, TraceHistogramMax: 4, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.0s, AutomataDifference: 786.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3653 SdHoareTripleChecker+Valid, 9.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3653 mSDsluCounter, 622 SdHoareTripleChecker+Invalid, 7.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 440 mSDsCounter, 1024 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19110 IncrementalHoareTripleChecker+Invalid, 20134 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1024 mSolverCounterUnsat, 182 mSDtfsCounter, 19110 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3458 GetRequests, 1699 SyntacticMatches, 65 SemanticMatches, 1694 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30368 ImplicationChecksByTransitivity, 21.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=360689occurred in iteration=44, InterpolantAutomatonStates: 1323, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 1428 NumberOfCodeBlocks, 1416 NumberOfCodeBlocksAsserted, 132 NumberOfCheckSat, 1999 ConstructedInterpolants, 0 QuantifiedInterpolants, 10855 SizeOfPredicates, 250 NumberOfNonLiveVariables, 5103 ConjunctsInSsa, 445 ConjunctsInUnsatCore, 121 InterpolantComputations, 7 PerfectInterpolantSequences, 302/1171 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown